Fish Are Way Smarter Than You Think

Many people assume that fish are less intelligent than mammals, but it turns out that isn’t true at all - they are actually way smarter than you probably give them credit for.
See the Mirror Test crossover video on SciShow Psych here:
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Sources:
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link.springer.com/article/10....
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www.nature.com/news/animal-be...
journals.plos.org/plosone/art...
journals.plos.org/plosone/art...
www.sciencedirect.com/science...
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www.nature.com/articles/ncomm...
link.springer.com/article/10....
www.ncbi.nlm.nih.gov/pubmed/1...
Image Sources:
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journals.plos.org/plosbiology...

[@SciShow]

See the Mirror Test crossover video on SciShow Psych here! kzbin.info/www/bejne/j5LTnIGrd8h1ipI

[@thinkabout288]

this is kind of fishy to me 🦈🐠💨💨💨💨💨💨💨

[@SquirrelASMR]

I liked this style of video with dual hosts! I like the interactions and variety. Keeps my brain alert. Does anyone else feel the same?

[@anthonydavidson6139]

SciShow more scishow quiz show please!! 😥

[@TragoudistrosMPH]

Is there a scent based self-identification test?

[@drewdurant3835]

SciShow mirror mirror on the KZbin!

[@louislesch3878]

I had one goldfish that lived for 13 years and he would wake me up every morning when he was hungry by spitting gravel at the glass. He knew that it made a lot of noise and figured out that I would respond to that noise.

[@amberhawksong]

Wowie

[@lizi.2503]

Mine are about 4 years old and they do this.

[@doloresdsmith]

Wow cool!!

[@user-es9vw2qi7v]

I observed one of the bigger fish in my tank bite off leaves and push them to the waste filter so the food grain won't flow into the filter

[@firecontent6841]

Now that’s cool 😂 for real for real didn’t think they lived that long

[@Master_Therion]

Of course they're smart. Every time 2 or more fish get together they're in a school.

[@thinkabout288]

GOOD ONE

[@srgkzy1294]

Hi, Dad !

[@FaceParrot]

OOF

[@sapphirII]

I'm missing seeing your comments in every video!

[@TerrariaGolem]

@spicywatermelon i hate my country

[@FirstNameLastName-qt2hz]

i knew that "3 second memory" bit was fishy

[@kobirasheed9332]

Good one

[@qu0zzi_353]

Wow. 👏

[@tserenjamtsbuyankhuu6505]

umm no they have 5 sec nemory

[@epcg2media]

lol

[@Seadalgo]

That awkward but brief moment when an octopus realizes his grouper friend also invited the moray

[@FISHYFINN1000]

i know im a bit late but thats funny as

[@sageoblouk6782]

Sadly fish still remain one of the most abused animals in the pet hobby. People need to respect these amazing animals and give them the proper care. Stop giving gold fish away at carnivals.

[@redmibaabu1958]

The inventor of the corona virus think the same He /she was like people are eating animals I have to do something So that's how the virus was originated only in China because they eat all animal, insects, plants And to lower the pollution, and to kill poor people from the world Viruses are not created by itself

[@claireyang7179]

yeah pet shelters take awful care of them and most people who buy fish think they don't need much care and don't rlly care if they die or not (at least not as much as they'd care about a mammal). also wild and farmed fish are killed at astonishingly high rates for seafood, much more than any land animals are

[@jdsguam]

You would rather the gold fish remain where exactly?

[@jdsguam]

@@claireyang7179 And your solution to all this?

[@claireyang7179]

​@@jdsguam to keep it simple, for pet, farmed, and wild fish, if demand goes down people won't breed/kill as many. as for how, it would need more widespread education (social media can help with that) before it becomes a commonly known thing and more people start to change

[@killtyrant]

And yet people fail to remember to use their turning signal. Can I replace some drivers with goldfish??

[@leeseoul5735]

According to scishow the fish will remember about 91% of the time which is a heck of a lot more often than people where I live.

[@qu0zzi_353]

U should

[@fireblade274]

20 min ago driving home from work, this dude/girl chose NOT to use the merge lane and just came to a stop and wait for traffic to pass. I WAS PO'd.

[@MrSlizz-wz5nb]

If you don't signal i stick my middle finger up at you🖕

[@LukeRen-rl4yv]

no

[@zuko1569]

Fish are so smart they were able to build Bikini Bottom and have their own economy, education system and hospitals. Damn

[@scottmantooth8785]

yeah...and that's only the part of their civilization they let us see

[@liriolua]

lets not forget they can light fire underwater

[@albericponcedeleon2696]

They can even teach other fish, crustaceans and echinoderms how to drive boats. Although they seem to have trouble with sponges.

[@scottmantooth8785]

@@albericponcedeleon2696 Porifera through no fault of their own do have a slight learning challenge in retaining cognitive skills even if done repeatedly...medication does help but it's only temporary...but foundations do exist that are exploring the possibility of a cure in the future

[@Rattus-Norvegicus]

@Captain Hindsight prostitution is the oldest profession, unfortunately other people have deemed it immoral and so some people just murder themselves in frustration.

[@waterunderthebridge7950]

Fish aren’t stupid at all, sometimes they’re just koi Also petition to rename non-schooling fish to home-schooling fish

[@SciShowPsych]

Independent Study Fish?

[@galaxi6585]

introvert fish

[@confushisushi]

Truant fish

[@MikhaelAhava]

Hmm…

[@Rattus-Norvegicus]

This joke was practiced in front of a live ostrich...

[@xck]

“Intelligence is subjective” are you calling me dumb?

[@dave5194]

Nah, just relatively dumb

[@josiahklein70]

I think you just did.

[@ActionAlligator]

Honestly, that was a really, really dumb comment in the video...it's like saying quantum mechanics or w/e is subjective because we don't have a full grasp of it. We obviously have pretty damn reliable ways of measuring intelligence and it will only get better with time; finding out fish are a lot smarter than we thought doesn't mean "intellimigence is subdective hurdur"

[@AronSilverwind]

@@ActionAlligator Dude, it's just referring to how we consider what is intelligent. Birds can build complex structures and that's pretty smart. Same with ants and how they prioritize which brood to bring to safety. Dragonflies can do an intercept course. also, we hear a lot about dumb people and smart people and there are dogs with more sense than people.

[@ActionAlligator]

@@AronSilverwind She said intelligence is subjective; it's not, it's objective. I don't know what point you're trying to make by bringing up ants and what not, but ok...they're also objectively unintelligent. (EDIT: I meant objectively less intelligent)

[@jtc3730]

I read the title as as "Fish are way smarter than you" and I was like, yeah I kind of agree

[@ursaltydog]

My lionhead fish would not come to anyone else.. they would hide.. but for me.. they came up to me and rolled over to have their bellies petted..

[@scottmantooth8785]

the fish whisperer

[@TerrariaGolem]

😎

[@farhanahmed2508]

Eat them. Quick!

[@TheChickenRiceBowl]

That's really cute.

[@ursaltydog]

@@TheChickenRiceBowl I adored the little boogers...

[@Mailman2-1Actual]

A fish can probably navigate better than me. I have a horrible sense of direction

[@92RKID]

Agreed.

[@MrPenetroso]

Same

[@limiv5272]

I'm extremely directionally challenged

[@injunsun]

And they have to navigate up and down as well.

[@Trebare]

You all spend too much time on your phone/laptop/tv. You cut those out completely and your sense of direction will improve

[@TragoudistrosMPH]

5:35 I never liked the mirror test because most animals aren't as visual as humans. Imagine a scent based test. Could a human identify itself by scent? Probably, but it's a weird thought, right?

[@Dragrath1]

The most telling potential issue I've heard of with the mirror test is that people can lose the ability to pass it after brain damage without affecting much else (besides coming up with delusions to rationalize the situation) which suggests its a specialized neural pathway and thus far closer to pure instinct in humans not connected to any "abstract thinking".... If true that is pretty ironic and would kinda invalidate the whole concept of the mirror test.

[@TragoudistrosMPH]

@@Dragrath1 that's really interesting! That makes me think of things like 'alien hand syndrome' or experiments where people are trained/tricked to recognizing a mirrored limb as their actual limb. :)

[@robhingston]

Or as vain

[@KingOfTheBeyond23]

My goldfish gets excited when you move your fingers on a corner cause we used to do it before feeding him. Pavlovian training worked.

[@joshuaewalker]

Thank you for this video! People in the fish keeping hobby have known this forever. I currently have goldfish, guppies, danios, and minnows and they're all very smart in their own ways but my big 'ol goldfish, plural, demonstrate great intelligence all the time. They really are the fish equivalent of puppy dogs. They even love being handled and pet.

[@Cinderpelt1002]

Now I know that my paradise fish not saying "Food, give." He's saying, "Feed me now hooman."

[@tommeng6522]

Gib gib gib gib

[@tanishqsuryawanshi1276]

You are late today so better hurry and feed me

[@TheElusiveReality]

fish working with other species of fish and creates to hunt together?? thats wild

[@crackawood]

my girlfriend's really smart and she smells like fish

[@user-bl4oq7fd8d]

@@TRC2002 Symbiotic relationships don't require any social interaction. Different species inviting each other to hunt together IS impressive :p

[@ZombieBarioth]

sandidge02 A symbiotic relationship is two species tolerating and benefiting from the other's existence, not quite the same thing. The fish's behavior is actually cooperative, between entirely different species. That's pretty unusual, and puts it into cat nurturing ducklings territory.

[@soogymoogi]

That time/place learning is the real deal. I had a dojo loach who'd be waiting for me at the corner of the tank closest to me seat when I got home from school. My mom's betta also flared at me when I got my hair cut. Like, who dis

[@mymorenoblepursuits9173]

I dont know if anyone cares, but I taught my guppies what food comes from which container. What's really interesting is that pretty much 96% of my guppies prefer blood worms and 4% prefer regular flakes. I'm really excited about the results.

[@divydumdrophello]

Wowww this is really cool

[@divydumdrophello]

I’m gonna do it with my beta who can recognize and gets excited when I bring out his food containers

[@lampekartoffel]

Yes! Thank you! I've always questioned how we as humans can say how intelligent other animals are based on our own brain! The whole "a goldfish forgets in X amount of seconds" or "a cow only thinks one thought a week" just never sounded right to me... I mean... We can barely distinguish the exact lvl of intelligence of our fellow humans with our tests designed for humans, so how can we judge other species so harshly?

[@incognitomode2574]

Octopus are so smart it seems crazy that we harvest them for food.

[@injunsun]

I say the same about all animals, but bivalves and worms. Since I don't need to eat them, and value their lives over my own desire to eat them and their secretions or eggs, I'm #Vegan4Life.

[@chistinelane]

It IS crazy

[@CoughE]

Fish are definitely smarter than me, that's for sure

[@thinkabout288]

naaaaaaaaaaaa

[@quirenciatala437]

You must be really dumb to think that. Oh wait you just said you are.😂

[@theworldoverheavan560]

@@quirenciatala437 lol

[@23pants68]

I love hearing all this. I wish people were more aware of how amazing fish are. Knowing how many of them die due to us fills me with so much grief.

[@kevinwalden4288]

Great video. Fish are a seriously underrated species when it comes to intelligence

[@t8ertot767]

Sounds like something a fish would say

[@JimCorrigan777]

I asked for a Cleaner Wrasse for Christmas one year. Santa brought me a bidet instead...

[@jamesscott2730]

Lol!

[@Kamel419]

next level dad joke right here

[@jacksonpercy8044]

A+ joke

[@limalicious]

I've questioned that belief for a long time because I've seen plenty of fish who can learn tricks and recognize people.

[@maherkamer5726]

I have trained my endlers to go through a hoop in the water they only do it if it show them a bloodworm above the water.

[@brokenacoustic]

Seems kind of logical that fish would have these abilities considering how long ago they started to evolve.

[@herranton]

My clowns would beg for food when I was close to the tank, but hide when other people came in the room. I never thought they were dumb. They constantly impressed me. One time, they went on an adventure to a dentists office. Oh, wait. I might be thinking of something else.

[@amycarter6337]

is your fish nemo lol

[@TheJohn8765]

That was really interesting. Thanks so much! I've heard a few podcasts about Wrasses and it makes sense how evo pressures in a crowded reef ecosystem could lead to a need for enhanced social IQ, but the communicative and co-beneficial behaviour of groupers and moray eels is pretty amazing to me. Again, thanks a bunch.

[@johnopalko5223]

I'm glad to see there are studies being done on piscine intelligence. As a life-long aquarist, I've always known they were pretty clever but, the plural of "anecdote" not being "data," I certainly couldn't prove it.

[@augustinesim1672]

*_Dory has left the chat_* Ps: Joke. I love Dory, she's the cutest animated fish ever and she was quite smart

[@davidchodds]

I absolutely love the two narrator format. Please do this all the time.

[@sr-7none196]

I once had a red tailed shark that would hang out in a tunnel with some upside down catfish over time I discovered my red tailed shark liked and would prefer to swim upside down just like the catfish it would tolerate so fish can definitely learn from each other.

[@KnightSlasher]

All fish grow up watching Rick and Morty

[@Mii.2.0]

Especially you, SpongeBob! ;)

[@nicholasperez2278]

Dont be the next Justin Y.

[@Mii.2.0]

^Don't listen to him.

[@xanderellem3646]

You know, I'm something of a scientist myself.

[@shleed]

Hello fellow lifeform. I would like to compliment your profile picture. *compliment noises*

[@draxiss1577]

Also, some Koi are straight-up *playful* with their caretakers! Like, they'll swim up to their human to be picked up so they can jump back in the water. Carp have levels of intelligence that even untrained humans can recognize.

[@Kousha]

That episode was great! Deep, complete and dynamic. Congrats!

[@Babs11549]

Ooh! Double hosts! Love this!

[@ursaltydog]

"Navigation doesn't necessarily mean intelligence".... Tell my cousin that who can't find her way home on her own daily....

[@MrGustaphe]

You can't disprove the lack of an implication by an example. A does not imply B? My cousin not B and not A Therefore A implies B!

[@ursaltydog]

@@MrGustaphe Never heard of sarcasm or humor eh? just.. nm..

[@defuncttobedeleted3675]

I think this format of two presenters is fantastic! Not only is it a great way to introduce SciShow viewers to SciShow Psych, but for me at least it helped me stay engaged longer and understand the concept more. It may require more resources to create videos such as this - but it was definitely worthwhile having this cooperation

[@mdkooter]

I believe the reason fish can distinguish between themselves and others in a mirror is because the water surface (when not too choppy) presents a perfect reflection at several angles. This means they are used to see themselves in a mirror - while land-based species are not (vaguely, in the reflection in a flat body of water maybe).

[@timsullivan4566]

Groupers and morays - hunting buddies! How cool is that?

[@siaskies1704]

My betta is very smart and most people don't initially believe that because they think fish are unintelligent. But she knows when bedtime is (there's a specific place in the tank she likes to "sleep"), recognizes me, follows my finger, and can jump for food. Fish really are amazing, and I enjoyed this video.

[@sarahwright7076]

Bettas are very clever.

[@huldu]

I had one of those elephant fish once. It was always terrorizing the ancistrus sp, which has a very tough outer body. Some of you may know that the elephant fish is quite special as it has tiny electrical charges to find food etc, kind of like an electric eel. It had no effect at all on top of the ancistrus however it learned quickly that by just leaning on the side and guiding the front "trunk" like thing underneath it would agitate the ancistrus. Yes, the elephant fish that I had was quite the bully in the aquarium.

[@xck]

That sounds like what my fish was telling me this morning. They are almost as smart as me..

[@mistybeats1368]

I was waiting for them to say “a 2012 study taught basic physics to a rainbow fish and by the next day it had created the most accurate interpretation of string theory”.

[@chefRyan38]

I think I've heard David Attenborough tell me all of these things before.

[@silverboiiii4205]

fish having 'haunting buddies' is such a cool concept also it was really intresting, i really enjoy your videos!

[@FelipeKana1]

I believe this idea about fish being dumb really started when fishermen who fish and threw the fish back in the water (like in recreational fish-and-pay places) wanted someone way to justify the torture theywere doing. Heard that a lot when young. Other species went through similar scenarios

[@adelaestrella3338]

Man splatoon's world is getting realer by the second,guess we better start stalking up on super soakers and t-shirts

[@uddhavn]

Fish : I am intelligent Person : but can you play chess Fish: humans really underrate smartness.

[@krzysztofczarnecki8238]

Humans have hard time defining "smartness" because we have so many built-in functions that are hard to implement but seem easy, only that they evolved for millions of years. And things that we can learn doing, but they require a lot of time and effort seem more difficult to us, as we have to do it ourselves. It took us much quicker to make a computer that beats people in chess most of the times (not to mention doing almost all sorts of crazy math) than to make one that walks on two or four legs on uneven ground or recognizes objects seen with a camera.

[@kthfox]

Really enjoy the co-hosted videos!

[@petervandermeij]

I really like the dual-presenter format. you should do this more often!

[@vitorcordeirom]

I loved these couple of videos hosted by 2 people

[@dalechenoweth915]

My pet Murray Cod would stack larger rocks on the bottom of its tank to make structures to camouflage against. It also recognised people and was distrustful when fed by strangers.

[@belshazer]

awesome episode!

[@EsKaioS]

Nice editing! Personally preferred this over the usual text slides

[@ericyager8858]

Great video... Also, you totally said cleaner-ass at 6:06 and nobody can tell me otherwise haha.

[@BlatentlyFakeName]

Each species has it's traits but they learn very quickly and they learn from each other. I've seen fish in my tropical community tank learning behaviour from other fish, especially around feeding. The common goldfish in my pond will follow my hand around underwater because one time I fed them from my hand.

[@prashantvicky]

As always, great video.

[@fawoki8519]

Please do more of those duo videos!

[@KoawNature]

Loved this one!

[@masterimbecile]

More crossover episodes please!

[@Bigfoot_With_Internet_Access]

I don't really think fish are all that smart. I mean like come on, they don't even know how to breath air.

[@xck]

This should be called ‘Giving Fish Mirrors’

[@frotwithdanger]

Could you two co-host again and then have whoever isn't talking mime the words of the other?

[@S_on_fire]

loved the video!

[@leahdelaney987]

Hey, you should deticate a video on psoriasis there's very few on here that give a good description of it and I suffer from it so it would be helpful

[@eschdaddy]

My goldfish does my calculus homework!

[@BlatentlyFakeName]

I have a mix of tropical fish in my tank and they know when feeding time is and where I usually drop the food. They also seem to be able to distinguish me from other people.

[@snowkracker]

I’m impressed by the testing methods. Taking the colored bowl thing is awesome. It makes me want to learn about other testing methods used by scientists.

[@tsmspace]

Uhh. Minds are minds. It doesnt take a brain to have one, and we just arent different.

[@decree4644]

Bum smack the teddly stick, and it takes a relative to make another! I like how you think

[@NotHPotter]

I'm a little freaked out by seeing more than one host on SciShow. I like it.

[@Mtz2604]

Love this collaboration

[@wcdeich4]

The MythBust4ers also busted the 3 second fish memory claim. Although my mollies failed the mirror test.

[@peacfulseas]

Transferred 2 Frying pan size , 3- 4" to 5" Koi from a 40gal to a 80gal tank. For days they would swim from left to right but at the right end of the larger tank they would only go as far as the length of the 40 gal tank. They would stack up in layers all as if they were pressed up against a glass wall. Measuring against the old tank it was an exact matching distance. I can't recall the number of days this behavior lasted but it was very noticeable. I even tried putting their food on the " Forbidden Zone " . They waited for it to float to the " Neutral Zone ".

[@Xiliaace]

Thank you so much for this video. Fish are so important to our ecosystem and I'm hoping this video helps give them the respect they deserve as a species

[@Christopher-N]

Fish are smart, they're just specialized for their particular environment. For instance, Eunice aphroditois-also known as the Bobbit worm-waits in ambush for its prey, but there's a fish that locates and blows jets of water over the aphroditois, ruining its ambush.

[@perspectivism2006]

Thank you for for making fish feel better about themselves.

[@emilyd8884]

I've always loved my goldfish and I've always thought they were smarter than people let on, this just proves it. Thanks scishow!

[@Travybear1989]

My wife and I rescued three goldfish for our son (and us lol) from the local bait shop to raise as pets and got them a 20-gallon tank full of colorful rocks, a few fish homes, things to swim through, and plastic sea plants and they are so vibrant and happy that it's a major mood booster waking up in the morning to feed them just so we can watch them hunt down the flakes. They truly are a lot more interesting than people give them credit for. I mean, you can literally see all three of them lined up in a row whenever I grab their food bottle and one of the fish (named Curly after the three stooges) loves to relax in his pineapple house while Moe tends to prefer the sunken fort and Larry, who is the largest prefers to sleep "outside".

[@thomasslone1964]

i got a veil tail beta on my desk, it often stares at me and does weird stuff like biting and pulling the fake plants, chasing gnats walking on the tank walls, ect

[@divydumdrophello]

I trained my beta to eat from a stick or my fingers, nibble/ hop out of the water at my finger, swim through a hoop without food, and follow my finger all in the first two weeks of getting him. He also greets all of my family members by swimming to the front of the tank and staring straight at us, probably because he thinks we will feed him. Regardless of his reasonings for doing these things, we all consider him one of the most intelligent and interactive, out of all of the fish we have had/seen. I think all beta fish and animals have amazing intelligence if we get to know their needs and how they think.

[@DylanFergusC]

two hosts is almost too much greatness for me to handle!

[@kchorman]

This is amazing!

[@AllanBrunoPetersen]

Interesting, thank you SciShow. :)

[@emeraldqueen1994]

I have 3 goldfish, they recognize my mom, our pet sitter, and me by face, name, and voice.... they come when called by name, they fetch others who are sleeping when we call, they swim backwards on command... and the LOVE trying to see how much faster they’ve gotten at emptying their food ball toy (PLASTIC XMASS ornament with holes drilled throughout) edit the oldest is 3 years old

[@uhohhotdog]

My aquarium pump is on a timer. It shuts off when it’s feeding time so as to not get food sucked into the sump and wasted. When the pump shuts off the fish start swimming near the top looking for food because they know it’s feeding time.

[@Hambonillo]

Nice teamwork

[@DANGJOS]

Fish can definitely remember the location of food. At my sister's old place, there's a small stream in the back, and fish would always swim up to me when I walked over. Either because I fed them in the past, or perhaps others feed them.

[@evanacey1414]

I never thought that today’s episode of Sci Show would have me second guessing my decision to eat fish...

[@johnwick-ii6il]

As a child I sat on the dock staring into the shallow water. I noticed several fish clearing out circular nests on the lake bottom. They had removed every piece of debris, no matter how small. Then they would wash the sand in their mouths until only a clean circle remained. After the nest was done, the fish would begin a hypnotic swirling dance over the top of it. Flashing their bright colors in the noon sun, and showing off their best moves to attract a mate Out of curiosity, I threw a berry into one of the nests. The fish quickly removed it, inspected his nest, then continued his dance. Each time I threw in another berry, the fish would take it farther away, and then swim in aggressive moves thru the community. Then the time came where the fish took the berry to his neighbors nest, dropped it in, and then began to attack his neighbor. After he returned from his attack, he would dance no more. Just swim in angry guard over his nest. It seemed like the perfect opportunity for further study. So I threw a bunch of berries into his nest. Well, as you can imagine... It was on ! The area erupted into chaos as the fish attacked all his neighbors, then began to bulldoze their nests with his face. Soon the debris in the water began to block all sight of the mayhem, so I continued on my way. Dr. Evil out.

[@AverytheCubanAmerican]

So when I eat Goldfish, I become smarter?

[@Mii.2.0]

Yes.

[@user-jh9nx6tl1n]

Don't eat goldfish pls.

[@user-jh9nx6tl1n]

@@sdfkjgh They are made out of gold. You are wasting gold.

[@pigeonfowl474]

THE SNACK THAT SMILES BACK

[@megalopolis2015]

This blew my theory of fish intellect out of the water.

[@Fawriel]

The moment I realized fish were smarter than I thought was when I saw a video of a fish repeatedly kicking sand into another fish's den just to piss it off. When an animal is capable of just doing things for shits and giggles, that's automatic proof of some higher brain function right there. And if it could even be considered a sort of prank, that's even more impressive!

[@dropmelon]

Don't know if all fish is like this but there're fishes that are also capable of being upset, traumatized, annoyed and be in disbelief.

[@carschmn]

Studying fish sounds like so much fun. I love fish.

[@Danilego]

I saw this in Life Noggin! Also Brit is my favorite host :)

[@Kenkasan]

Awesome. Thx !

[@ayemjake]

I came across a video on a Puffer Fish that easily picked up that if he copies the guy and spit water above the pool... he'll be rewarded... The man just showed the puffer how to do it by him blowing water outside his mouth, and this happened in a very short span of maybe just a few minutes. The video's title is *How to train your Puffer* by Gallery Aquatica TV