From Crabs to Flies: 5 of Nature’s Most Doting Parents

[@SciShow]

We have an update on this episode! The paper about parazens that we reference for #4 in this list (06:48 - 08:11) has been retracted! Here is the rebuttal of that original paper: www.preprints.org/manuscript/202004.0132/v1

[@pamelamays4186]

Rainwater Nursery: sounds whimsical, like a place baby fairies hang out. Corpse Nursery: sounds like the name of the most badass metal band ever!

[@Novella1]

I also make videos on my channel and put a lot of effort into it. But it's hard to get recognized. Could anyone check it out and tell me their thoughts? Thank you

[@southhill6667]

"Not only is it dead animal, it's dead animal puke!" Well I certainly wouldn't want to see alive animal puke.

[@Novella1]

I also create videos on my channel, but it's tough to get recognized... Can someone check it out and tell me their thoughts?

[@southhill6667]

@@Novella1 Spamming everyone on another channel's comment section is not really the way to go, mate. Gives people a bad first impression. Even if ya may get a small influx of people to check out your videos, if you do it too much you'll give yourself a real bad reputation.

[@thefreakmachine]

Than imagine...zombie animal puke!

[@treenutspeanuts]

“it’s very difficult to eat when you have a mouth full of babies” quote of the day

[@Novella1]

I also make videos and put a lot of effort into it, but it's hard to get recognized. Could anyone check it out and tell me their thoughts on it? Thank you!

[@bupdragon4694]

Lol i instantly was nostalgic thinking how long its been since ive had a mouth full of babies. Dam you Covid-19!!

[@alyssaellison5657]

Mikhail Daughtrey I-

[@sparaxisblanc2473]

I'm surprised THAT'S a deep sea fish. It looks like something you'd see in a reef.

[@FupaDoncic]

That’s what she said

[@JohnSmith-qq7fm]

3:40 "Research has shown that babies grow up faster if their parents feed them". Probably the best advice that can be taken in or out of context

[@danielm.1441]

"Not only is it dead animal, it's dead animal puke!" I _almost_ want this on a t-shirt.

[@frikativos]

Honestly, I prefer them eating animals when they are dead rather than alive. And same goes for humans.

[@S8tan7]

I *definitely* want that on a tshirt

[@TheMightyWobb]

The face he made when he said it kills me

[@danielm.1441]

@@TheMightyWobb The face would have to be on the t-shirt, obviously.

[@thanhavictus]

Was really hoping to see footage of the crabs inside the plant. That seems really cool

[@Nhoj31neirbo47]

“Parenting....is not for the weak.” - Daddy Hank

[@mcknottee]

"corpse puking beetles" Only on SciShow could you hear such a phrase. :) Love your work, SciShow. Keep at it. :)

[@tangelopie600]

"Tired of getting smarter? Of course you're not!" well done knowing your audience.

[@KY_CPA]

Discus fish babies are ADORABLE! But I can't be the only one who realizes how morbid it is that Fish Fry technically refers to baby fish?! These videos are great pick me ups to which I always look forward.

[@Helveteshit]

Meanwhile he said eggs rather than Roe which is the name for Fish Eggs.

[@WWZenaDo]

@The Lavian "Small fry" also refers to young humans.

[@eduardogutierrez2920]

Discus fish: *does everything it can protect its young* Humans: "Let's call them fry"

[@jansenart0]

I think the mouthbrooding of the parazens could be explained by just the lack of feeding opportunities in the mesopelagic zone. Sure you might have some photosynthesis but since you're feeding mostly on seafalls, marine snow and other detritus, it makes sense that if you want your baby fish to eat and not be eaten by some crabs, you keep em on you.

[@VGlauren]

I would have loved to see the Splashing Tetra on here. Their egg care is pretty amazing.

[@UKdajenx]

I was going to stop watching videos, then this came out, so I thought I'd CARRION 😂

[@christelheadington1136]

That joke is DOA

[@thefreakmachine]

You sir or madam, have just won an internet for your nice pun. Well done!

[@richarddavis3980]

BOOOO! 👎

[@QuestionEverythingButWHY]

“Children have never been very good at listening to their elders, but they have never failed to imitate them.” ― James Baldwin Does this apply to every creatures?😂

[@TheTerrainWizard]

“...also I just told you about corpse puking beetles.”

[@bouletmarc]

some freshwater aquarium 'Cichlid' fish are monthbrooder aswell, we do have couple cichlid in our aquarium that are. The female usually eat a lots just before she breed and then she will not eat not only for the incubation periods of the eggs in her mouth but for several more days until the fry get bigger and she release them, she can get very skinny loosing weight. They are very protective parents and the whole process are kind of entertaining to watch. On the first fews days that the fry are free and released, if the mother feel unconfortable about her babies security, she will catch them all back in her mouth.

[@rainydaylady6596]

Glad I finished my apple before watching this. 😀🖖💕

[@abdullaalmarri2232]

No such luck for me...

[@MariaMartinez-researcher]

I am still having breakfast... 😂

[@CaskillsElliptic]

I love how many times Hank was able to say “corpse”; “corpse nursery” was probably the winner for me 😂

[@duanesamuelson2256]

Cichlids as a group practice parental care. Many of the rift lake cichlids practice mouthbrooding and Discus aren't the only South American cichlids that feed their fry off their body slime (thought they are the most dependent on it). A side note Discus in the hobby are often raised totally independent of their parents, those interested can find the technics easily enough. It is very labor intensive however.

[@jerden3285]

I want a heartwarming animated movie based on a burying beetle family!

[@ancientswordrage]

I love these crabs. More crab content please.

[@melvinshine9841]

The corpse beetles sound macbre and adorable at the same time. Though, if I had a choice between a prepared dead animal nursery and a poop nursery like dung beetles do, I'll take the corpse.

[@FilledCircle]

"Disease free corpse house" -Hank Green

[@Snakeyes244]

“2% of fish are mouthbrooders” “Let’s pick a parazen as an example who MAY be a mouthbrooder though we don’t know for sure!”

[@rld9429]

Yeah. Lots of cichlids are mouthbrooders. Common aquarium species. Why no footage?

[@olenhol2przez4]

"Remeber I just told you about corpse puking beetles"

[@RustyTube]

That’s the weirdest pronunciation of _tsetse_ I have ever heard.

[@MrsGlynn07]

Yeah. I've always heard "tsee-tsee."

[@Aleer1000]

The way Hnak pronounces it is the British way.

[@Beryllahawk]

I would so like to see a blooper reel for this video, because it seems like Hank was having QUITE A TIME trying not to break up into giggles.

[@ThomasKremer5973]

So interesting video, keep going guys !

[@auditoryeden]

"...humans, for example, can be a great example..."

[@chikiwiki64]

6:33 Not for Kronos, it isn't!

[@lyndsaybrown8471]

If only my parents could afford a corpse nursery. All we had was sticks and rocks.

[@thefreakmachine]

Corpse puking beetles in a nursery-corpse. TOTALLY METAL! BRUTAL METAL!!!

[@jjjackson5655]

I really enjoyed the fact that Hank wanted us to see that they may be different, but that shouldn't mean it's gross.

[@cyberhard]

I'm thinking of starting a new business. How many tsetse flies do I need for a gallon of milk?

[@alexanderguerrero347]

The beetles seem really cool

[@damenwhelan3236]

They are. In the event the corpse doesn't provide enough food the mother will select the most demanding babies and eat them. Feeding their remains to their siblings.

[@dougpbcc]

My best friend is a beetle. Can confirm

[@jasonchen4807]

Why aren't my parents featured in this video? Oh wait.

[@Slim3398]

Another quality video as always. Stay Gold!

[@anarchyantz1564]

The sentence "Keeping the carcass clean" sounds like an oxymoron

[@hhjk377]

Corpse Nursery is my favorite metal band.

[@dissonanceparadiddle]

Awww larva are so cute 🥰

[@bupdragon4694]

"It's very difficult to eat when your mouth is full of babies." Sounds like a typical friday night to me 😁😈😉

[@maggiee639]

👀👀

[@Puddlef1sh]

Niice

[@papperdakVG]

If she breathes.....

[@martina13118]

"they discovered eggs inside the mouth of a female specimen"

[@gunnar7593]

This is splendid and fabulous =)

[@chairly]

I love your tik toks Hank!

[@rezkel7404]

Doesn't everyone eat corpse meat? Wait at what point is a vegetable or grain considered to be dead?

[@MariaMartinez-researcher]

Maybe when it's cooked or preserved in any way that definitely stops every kind of cellular activity, like pickling or dehydration. However, fresh fermented food would be like making it alive again. Frankenstein food. On a funny note, in the Star Trek universe, Klingons are notorious for being carnivores who consume a lot of alive food, namely "gagh." I think in Korea they eat living squid or tiny octopuses. Cheking now. Checked and not only in Korea there are alive meals. en.m.wikipedia.org/wiki/Eating_live_seafood I remember being a child in Chile, that eating raw seafood was usual, sometimes still alive, usually clams and sea urchins. The last ones may have inside a small parasite crab, which was a delicacy to be eaten raw and alive. I saw that once. All of that ended when the waters were contaminated with Asian bacteria and red tide algae. No raw seafood is the rule. 👋

[@dinosinspace]

Could you explain why freshwater ecosystems are more stressful to the crabs compared to marine ecosystems? I would have thought the opposite to be true.

[@cheesemonger6378]

Me: oh boy sci show can’t wait to watch that at lunch Corpse beetle vomit: h e l l o

[@dougpbcc]

Haven’t watched yet but I bet octopus has got be at the top Edit: yea so, umm, i was wrong. Clearly

[@MissingRaptor]

I, too, was hoping for the octopus 🐙

[@gregslingland3576]

Isn’t there a worm that feeds its young its own skin?

[@Dragrath1]

There is an animal which does this but it isn't a worm it is a clade of legless amphibians known as Caecilians. It is also a special type of skin the mother grows for her babies to cover the babies nutritional needs

[@Dubmaster3]

Our convict cichlids had a bunch of fry and both parents were very protective of them. They even went as far as killing the third cichlid so they and their babies were the only cichlids in the tank.

[@hennyyy1723]

All the stuff is beautiful

[@jacobhenry7621]

Hank, I love your shirt! Where'd you get it?

[@factsyoudidnotknow4350]

4:23 these fishes look beautiful.

[@Great_Olaf5]

I wonder if the Parazen's eating method is actually a part of why they evolved to hold their eggs in their mouths. They're already used to being picky about what goes in their mouths goes the rest of the way in, so it wouldn't surprise me that they'd have been good at avoiding swallowing their eggs before developing that membrane. Could've been that they kept taking in their eggs while winnowing, and filtered them out of what they wanted to eat, but just, didn't dump them with the rest of the stuff they didn't want to eat.

[@maxlucas3785]

Love this so much

[@erelfink8822]

There's a few fish breeders that can raise discus fry apart from their parents using small foods like infusoria and baby brine shrimp

[@rammon147]

Loving this shirt

[@Shazistic]

Life is full of rivers, the ones who succeed are the ones who build bridges. The ones who don't are waiting for an imaginary boat to take them across." -The Shades

[@victorjones2506]

Maaan, this is great!

[@golgarisoul]

Lovely little corpse nursery.

[@minnymouse4753]

Im sick how parents keeps saying how I brought you up I most have done something right. If parenting was such an impossible task we would already extinct millions of years ago

[@jesusx5258]

"...it's very difficult to eat when your mouth is full of babies" -- Hank Green This quote should be on a scishow t-shirt under Hank's face!

[@ironclad7177]

i love crabs, and i love eusocial species...when i realised there was a combination, i rlly went nuts

[@thomashellecke5680]

This is engaging work :-)

[@ericfan1223]

LOVE discus. Cichlids are the BEST

[@mikevandyke8497]

All of the stuff is nice

[@chloepeifly]

a lovely little corpse nursery 💕

[@cheyenneismyname4279]

I think Hank was a bit surprised, maybe disturbed, of the corpse puking beetles.

[@guyabbott6852]

Hey guys and gals, so since the duct in our nasal cavity at the top has it ever been considered to physically flip them to prevent cold symptoms???

[@lucasyang4178]

i’ve been watching this guy for years but... man, i just feel like he’s different since he’s gotten on tiktok 😫

[@vasp99]

Hank!!

[@instaperil]

Happy mother's day

[@LadyCynthiana]

Sometimes I think we are missing intelligent life right under our noses, because it's just too small for us to understand. Insects have some incredibly complex behaviors and it's the things like the burying beetles, or bee communication, or ant colony innovation that rings my intelligence bells.

[@Cookie20212]

I love Mr Hank :)

[@ehjaybee85]

I'm definitely naming my death metal band 'Corpse Nursery.'

[@rasithvidusara5868]

Keep it up guys❤ interesting 😲

[@daveayerstdavies]

Mammary glands are structurally similar to other cutaneous glands and probably evolved from sebaceous or sweat glands.

[@grannykiminalaska]

I'd just like to point out that many animals feed their babies corps puke, baby birds... But this was very cool

[@jadyn23200]

Hey! I just saw Hank on tiktok smelling popcorn pee 😂

[@danielm.1441]

Also, am I the only one weirded out by the concept of a 'fly uterus'??

[@trishapellis]

The 'uterus' is really just the biological structure inside the body where egg cells are combined with sperm and potentially wrapped up in an actual egg, or otherwise develop into young. Chickens have them, and in a chicken it's the plade where sperm meets egg cell and the whole gets wrapped in several layers of yolk, white, membranes and calcium, while in mammals it's where sperm meets egg and the result just kinda hangs out. But this means that all reptiles, amphibians, birds and insects have a uterus or something like it - the tsetse fly is just the only insect that uses it the same way mammals do. Also, yes, that one blew my mind as well. I knew one or two snake species hatch from their eggs right before the eggs are laid, but this one's new.

[@umi3017]

Two things left in my head after this video 1. fish that makes milk. 2. fly that bite.

[@Livingbeing01]

I am just guessing but can tsetse flies be considered a link between mammals and arthropods? Or is it sorta convergent evolution🤨?

[@tomasmondragon883]

Convergent evolution, arthropods and mammals are on completely separate branches of the family tree that split before arthropods even existed, back when the protostomes and the deuterstomes split because they didn't agree on which hole was the mouth and which hole was the anus.

[@Livingbeing01]

@@tomasmondragon883 thanks 😊for clearing my doubt

[@mmseng2]

Gif-worthy clips: 3:31-3:34

[@horrificabomination]

What about Octopus moms? They straight up die for their young but I guess that doesn't leave much room for doting.

[@patrickmccurry1563]

Well, there are also a few insects where the offspring devour the mom from the inside out. The amphibian caecilians produce thickened fat rich skin that offspring chew off until "weaned".

[@erikn.7540]

The burying beetles segment was a great reminder to not watch nature-oriented SciShow content while I'm eating

[@Marie-cq7eq]

So is larviparous similar to ovoviviparous? I wonder what the difference is?

[@AlbinoTuxedo]

If I recall correctly, oviparous means that the animal lays eggs, viviparous means the animal gives birth to live young, so larviparous should mean that the animal gives birth to its young in the form of larva

[@Marie-cq7eq]

AlbinoTuxedo But Ovoviviparous means the animal, for example a reptile, retains the egg inside her which develops and then is birthed live after ‘hatching’ inside her. It seems really similar to larviparous where the larvae hatches inside the mother Tsetse fly and is birthed live. Am I missing something?

[@Abc-tx5hy]

tsetse (pronunciation) was responsible for spreading deadly fever (parasite) that killed lot of people in africa in 80s.

[@Rubrickety]

"It's very difficult to eat when your mouth is full of babies." Oh, you don't have to tell me that, Hank. Preachin' to the choir here.

[@patrickmccurry1563]

Humans CAN be a great example... Ouch, such a harsh truth.

[@Whendidweloseit.]

This video: Discus are amazing parents. Me literally watching my Male discus eat the eggs his partner is laying....😭 they aren't winning the parent of the year award.

[@otavioluis5774]

This fish is of my contry

[@melaniepalker9998]

This is a little off topic, but I'm wondering would the amount of ash coming out of the California fires have any kind of impact on climate change? My daughter lives in Orange County and her vehicle was covered with ash this morning I know that Volcano eruptions and those huge amounts of ash have caused impact on global heating what are your thoughts?

[@Eneov]

Octopus gonna be here, for sure.

[@Al13n1nV8D3R]

Regarding the beetles....last time i checked us humans eat dead animals too so i see no issue as that being gross.

[@FloweyFanClub]

BABY! BABY IN MOUTH KEEP BABY IN MOUTH KEEP SAFE

[@ozfocus]

Clicked as soon as I saw the Discus.

[@panostriantaphillou766]

Hollow cavities? Is there another kind?

[@hollyw9566]

Someone may have already mentioned this, or it may be in another SciShow video, but the pedant in me won't let me not say that another species of "bug" also takes care of its young: Earwigs. Yeah. Now I have a problem killing the occasional earwig that I find hanging out in my shower. I may eventually have to become a Jain.

[@iraklisk6288]

define weak if you can, because you can't. These are human made concepts and in reality organisms cannot be compared to each other. Each one is unique and survives defying odds with its given means and by using a little bit of luck ;)