These Sea Slugs Are Thieves

Visit brilliant.org/bizarrebeasts/ to get started learning STEM for free. The first 200 people will get 20% off their annual premium subscription and a 30-day free trial.
There are many creatures on the internet that do not actually exist, even though we would like them to. Like, would you believe there is an animal that can photosynthesize, decapitate itself, and is incredibly cute? They are the sacoglossan sea slugs.
Get your own fantastic sea slug shirt here: store.dftba.com/products/biza...
Subscribe to the pin club here: store.dftba.com/collections/b...
This month's pin is designed by Emily Alvarez. You can find out more about them and their work here: www.emilyalvarez.art/
You can cancel any time by emailing [e-mail]
Host: Hank Green (he/him)
Follow us on socials:
Twitter: / bizarrebeasts
Instagram: / bizarrebeastsshow
Facebook: / bizarrebeastsshow
#BizarreBeasts #SeaSlugs #leafsheep
-----
Sources:
www.ncbi.nlm.nih.gov/pmc/arti...
web.archive.org/web/201310050...
eol.org/pages/46448596
www.sciencedirect.com/science...
academic.oup.com/jxb/article/...
www.ncbi.nlm.nih.gov/pmc/arti...
www.researchgate.net/figure/E...
www.tandfonline.com/doi/abs/1...
www.science.org/content/artic...
www.cell.com/current-biology/...
------
Images:
commons.wikimedia.org/wiki/Fi...
figshare.com/articles/media/V...
journals.plos.org/plosone/art...
uk.inaturalist.org/observatio...
uk.inaturalist.org/observatio...
www.biodiversitylibrary.org/p...
www.eurekalert.org/multimedia...
www.gettyimages.com/detail/10...
www.gettyimages.com/detail/11...
www.gettyimages.com/detail/11...
www.gettyimages.com/detail/11...
www.gettyimages.com/detail/11...
www.gettyimages.com/detail/11...
www.gettyimages.com/detail/12...
www.gettyimages.com/detail/12...
www.gettyimages.com/detail/12...
www.gettyimages.com/detail/12...
www.gettyimages.com/detail/12...
www.gettyimages.com/detail/13...
www.gettyimages.com/detail/13...
www.gettyimages.com/detail/13...
www.gettyimages.com/detail/14...
www.gettyimages.com/detail/14...
www.gettyimages.com/detail/14...
www.gettyimages.com/detail/14...
www.gettyimages.com/detail/14...
www.gettyimages.com/detail/15...
www.gettyimages.com/detail/15...
www.gettyimages.com/detail/15...
www.gettyimages.com/detail/15...
www.gettyimages.com/detail/16...
www.gettyimages.com/detail/17...
www.gettyimages.com/detail/17...
www.gettyimages.com/detail/18...
www.gettyimages.com/detail/46...
www.gettyimages.com/detail/54...
www.gettyimages.com/detail/83...
www.gettyimages.com/detail/95...
www.nara-wu.ac.jp/bio/yusa/in...
www.ncbi.nlm.nih.gov/pmc/arti...
www.umiushi.info/kanri/photo_...
• コノハミドリガイ自切直後　Sea slug ...
zookeys.pensoft.net/article/3...

[@BizarreBeasts]

Visit brilliant.org/bizarrebeasts/ to get started learning STEM for free. The first 200 people will get 20% off their annual premium subscription and a 30-day free trial.

[@catebrooks6779]

Please go into if we, as humans, can go into chloroplasty... It's I got it right. Can we, as humans, ever get what we need totally from chloro things plus us or whatever????😮

[@anthonyd.1428]

Forget the course on learning about solar power, I'm going to eat green algae. My reasoning is that if I eat enough of it, I can become photosynthesis. Perhaps even regrow my body if I ever lose my head.

[@mk_rexx]

We can now finally Taste The Sun™

[@nessidoe8080]

And you'll get all the Omega 3 you need!

[@ArawnOfAnnwn]

Many times it has been suggested that perhaps one day we can incorporate photosynthesis into our tissues and so not need to eat anymore. Allow me to clarify that iirc it's been calculated that we'd need a photosynthetic surface area about as large as a football field just to power our resting energy use, let alone any actual activity. You wouldn't be able to skip even a single daily meal by relying on solar power. So while fun to contemplate, it's not really all that practical. So how do plants, and these slugs, do it? Simple - they use barely any energy to begin with. Even these literal snails can't survive indefinitely on just photosynthetic energy, and we use way more power than snails do. And plants ofc use even less power.

[@finlay9616]

I'm not going to tell you this wouldn't work and I support you in your efforts

[@anthonyd.1428]

@@ArawnOfAnnwn butttttt... it can be done!

[@iainawatson]

These guys are delightfully Pokémon-esque.

[@ferretyluv]

A water-grass type!

[@fatjellyfish9478]

maybe a water type with the ability to gain the grass typing when it attacks a grasstype@@ferretyluv

[@wikansaktianto9215]

Pokemon will sue em

[@Zero_Li24]

You mean Pal-like?

[@rheya100]

@@Zero_Li24 pokepalmon

[@MeganG.Andersen]

Why does "Sap sucking sea slug" sound like an insult? Lol they're so cute!

[@K.Spade7902]

They are called Kleptos for a reason. They are very colorful and cute!

[@Polloles]

Pfhahahahah it does!!! I’ll try to use it as an insult from now on!!

[@ArawnOfAnnwn]

Many times it has been suggested that perhaps one day we can incorporate photosynthesis into our tissues and so not need to eat anymore. If anyone watching this episode was reminded of that idea, allow me to clarify that iirc it's been calculated that we'd need a photosynthetic surface area about as large as a football field just to power our resting energy use, let alone any actual activity. You wouldn't be able to skip even a single daily meal by relying on solar power. So while fun to contemplate, it's not really all that practical. So how do plants, and these slugs, do it? Simple - they use barely any energy to begin with. Even these literal snails can't survive indefinitely on just photosynthetic energy, and we use way more power than snails do. And plants ofc use even less power.

[@wolf986]

@@steelmote Yah my scurvy is acting up again, I cant wait to be green

[@krystofdayne]

Also I imagine the square-cube law comes into play, for the slugs at least. Even without the leaf-shaped appendages on some of them, they definitely have a lot more surface area compared to body weight than we do.

[@martijn9568]

​@@krystofdayneWe, us humans, are even worse of, because we stand upright. Thus exposing a smaller area to the sun.

[@MaxBrix]

You just ruined all my plans.

[@akpsyche1299]

Kinda makes me wonder how Namekians do it.

[@Aukejorrit]

I love leafsheep! I made a pokemon design of them last year for a design contest and got picked. Ever since, i've been an advocate for them, telling people how cute and interesting they are!

[@taylor_green_9]

They're literally the perfect animal for a Pokémon design. Where can we see yours?

[@Aukejorrit]

@@taylor_green_9 it's in the "let's redesign your SPRING themed Fakemon" video from Tam Valley Productions! My entry is at 10:21 and i called it Bladskoap. Both my design and Tam's redesign are in it. Mine is more like the original animal, his is more pokemon-like!

[@taylor_green_9]

@@Aukejorrit Thanks!

[@TaLeng2023]

I've always wanted a regional Shellos that is a leafsheep. Imagine Water/Ground + Sap Sipper.

[@Robotduck7]

I need everyone to go back to 2:50 and appreciate how cute the baby Sea Slug is.

[@alexandriatran3843]

Omg I didn't even see it infront of the larger one. How cute!

[@sir9integra9jr]

“kleptoplasty” is my new favorite science word

[@TunaFreeDolphinMeat]

Worth looking at images of the sea slugs and nudibranchs. The variety and colors are amazing.

[@hollym7878]

I think this might be one of the most bizarre beasts yet!

[@BLOODKINGbro]

Tis be but a flesh wound

[@Tser]

The Octopus Lady has an amazing video on these guys as well! The pin is so cute, I can't wait for it to come.

[@momothebug]

I've been thinking about joining the pin club for a long time. Last year I did the Awesome Socks Club and it was amazing. I love Bizarre Beasts and I watch it every month with my dad and always love the pin designs. Leafy Sea Sheep are one of my favourite animals and the minute I saw this video I knew it was the sign I was waiting for to join the pin club. I need that little GUY. Can't wait for him to arrive!

[@KY_CPA]

This is SO cool! It's rare anymore that I find a wholly new to me creature that is also so cute and fascinating! 🤯

[@Nmethyltransferase]

Me: *swims up to this middle finger to nature* "How are you real!?" Leaf Sheep: "Deal with it!"

[@AthAthanasius]

01:23 - Anyone else get a fit of the giggles, because the ... antennae ? ... and eyes on a bump of this one make it look like it's waving its arms around ?

[@mostlyghostey]

As someone with a chronic illness I wish I could regrow my body.

[@Rose-ff3fi]

Get well soon

[@sarahblack9333]

​@@Rose-ff3fi what do you think the word "chronic" means dude

[@PLuMUK54]

My first thought, when Hank described the separation of the head from the body, was the Borg Queen! My second thought was the separation of the Enterprise. I think I watch too much Star Trek.

[@gerimaple]

No such thing. Live long and prosper. 🖖🏻

[@Stipopedia]

Next epsiode: The Enterprise seperates it's hull as a last-ditch defense against parasitic Borg.

[@chesterfieldthe3rd929]

Engage

[@jamesdriscoll_tmp1515]

Gastropods be trippin

[@Beryllahawk]

Voluntarily become a plant for a year - SIGN ME THE HECK UP Can you imagine how much you'd save on food bills... Also I could watch these little dudes for hours, they're so cute and seem so chill. What a fabulous beastie!

[@Shae_Sandybanks]

Aww they're so cute and weird. Love it!

[@jamielandis4606]

Did anyone catch the tiny little little baby? Aw adorable! It’s at 2:53.

[@DissociatedWomenIncorporated]

Oh my god they can separate the saucer section, I love them already ❤️ can these adorable little creatures be given a good life in an aquarium?

[@NewMessage]

A 'sack-o-glossans' does sound like something you'd reach into, and pull out a slimy hand.

[@benjaminforman8901]

2:50 OMG, look at the wee little one right in front of it!!!😮😍😍

[@brendanhoffmann8402]

Wow, it's amazing to me how so many people guessed this animal from it's silhouette!

[@markusgorelli5278]

Ze Frank did an episode some time ago and included leaf sheep. So adorable - it was the first time I heard and saw this creature. I expect if anyone saw this covered by other channels they would recognize it's distinctive shape.

[@amypieterse4127]

I knew it! These little critters are sooooooo cool and cute.

[@Fitzs1]

This is the first time this channel has popped up for me, even though I follow Sci Shower and VB. Awesome stuff and would love to see one about the armoured spine of the Hero Shrew.

[@GhostNinja0007]

2:50 The little baby one is so tiny🤣

[@lbell1703]

Damn, man. I've been wanting a pin subscription ever since I found this channel and think it's a little much for me, but the leaf sheep has me sold. Always thought they were adorable. Hope to get a subscription if I have money at the end of the day 😭

[@TheEnding247]

Man I wish I could get that design on a sweatshirt, I love how cute the leafsheep are they are so adorable!

[@raynmanshorts9275]

"I'm getting old. I can't regrow my entire body like I used to."

[@lesliewit]

Every time I learn more scientific discoveries, the premises for my favorite fantasy end sci-fi shows become less and less improbable. I really really love this planet!

[@streled5361]

*Sea slug gets infected by a parasite Sea slug "Oh no..." *Separate its head from its infected body to grow a new body Sea slug "... anyway"

[@alexandermain5102]

I saw a pangolin in a magazine designed to test your knowledge on fake news and real news. A funny thing was that food delivered by drone was also in the same magazine under fake news. If only the writers knew.

[@kyrab7914]

I thought it might be these guys! The octopus lady did an episode on them that's v similar. These lil guys are so cute, I love the pin design!

[@hunteratops]

this is my favorite bizarre beast yet😊

[@laurachapple6795]

Good on the sea slugs for staying A HEAD of their parasites!

[@Regfife]

Adds a whole new dimension to the saying "You'd lose your head if it wasn't on your shoulders!"

[@CritterKeeper01]

Now picturing how different "Highlander" would be if the writers knew about these guys!

[@adrasteia3866]

Yes finally! I've been waiting months for this! 😃😄

[@franzjayne672]

I do enjoy learn about Bizarre Beasts and todays is indeed bizarre , Keep them coming . WHat happened to your Deep Sea Creatures Videos ?

[@franciscorosa1498]

Yay the kleptoplasty

[@lazarusrat6159]

Man, I wish I could just ditch my body when it got too messed up. Being human is hard.

[@izzyxblades]

"oh no! The copepod made my body sterile!!! I better shed it right away"

[@fdulcia8528]

I love them so much. They look so cute. Leaf sheep and Sea bunny ❤

[@huldu]

That's really fascinating! I had no idea some animals could steal the photosynthesis part of a plant and then use it themselves as an energy source. I wonder if it would be possible to have a human undergo a similar process, green humans.

[@azulimarill]

I don’t think it would work with humans, but there is one species of vertebrate that is known to use photosynthesis: the larvae of the spotted salamander. Their nursery pools don’t have predators but as a trade-off are really nutrient poor. So, the developing salamanders incorporate green algae into their tissues and the algae provide them with oxygen and carbs as they photosynthesize!

[@quique6676]

I clicked because awwww. I stayed because I heard Hank's voice! Yay!

[@moonstonepearl21]

What adorable, beautiful, and unique creatures that come in so many wonderful varieties! I love looking at all the different types. They're so fascinating biologically. The head thing I can do without though.

[@wweturtle]

These lil guys are awesome

[@devinayaz9210]

leave it to hank green to make me enthralled enough to watch a video about sea slugs XD

[@itsdonaldo]

What do you call someone without a body or nose? Nobody Nose

[@tripwire202]

Did anyone see the baby sea slug next to the Costasiella Kuroshimae? I've never seen one that tiny before! Amazing. Adorable.

[@arsonsnail]

time stamp is 2:50 if anyone needs/wants it!!

[@tripwire202]

@@arsonsnail Thank you arson snail! (Great username.)

[@goldentriforce29]

When I saw these little guys I almost thought they were original Pokemon or video game animals. I was surprised to learn they were real

[@LightBlueVans]

Octopus Lady fans are literally SHAKING!!! (with excitement)

[@mecahhannah]

Awesome as always thanks

[@zray2937]

What do you mean that the body contains "most" of their reproductive organs?

[@youtubestudiosucks978]

Namekians

[@ClodsireBcuzYes]

me reading title: ofc, they stole my heart and have yet to return it.

[@allisonbergh4429]

The Octopus Lady did a great video on these lil cuties

[@evaceratops]

i volunteer in a lab that studies sacoglossan sea slugs (hoping to get in there for grad school, actually)! most of what i’ve been doing there is sorting through all the polychaete worms they find in the sediment core samples, but i’ve learned a lot about the slugs too; they’re such cool little guys! the lab works mostly with our local sacoglossans in the genus Alderia, which are not quite as pretty as the slugs in the video, but they’re all fascinating!

[@sharonkaczorowski8690]

They are absolute proof of nature as art!

[@DelphiaStrickland]

I always need more energy. I think I'll start eating only algae, so I can simply photosynthesize. Being green was good enough for Kermit!

[@Romanticoutlaw]

they really did say "😶" and steal all those leaves

[@chrisreilly1290]

That is absolutely bizarre

[@eddies6977]

Fascinating!

[@sainjawoof3506]

Could the unidentified one possibly be Cyerce elegans (Butterfly sacoglossan)?

[@phexitol]

1:33 That's just the Elden Beast as a baby.

[@jimparsons6803]

Cool. Sort of like with Frankenstein?

[@TheCaphits]

I know it's different, but it kinda reminds me of deciduous trees losing their leaves every year.

[@AifDaimon]

Real life version of DEADPOOL, a Marvel character with a healing factor so powerful he can survive decapitation & even regrow his own body

[@valerieouellet7725]

Love this!!

[@mina9e]

I know more facts about sea creatures than the average person, and it's been a while since i actually learned anything new, rather than just repeats of things i already know. Suffice it to say, when they showed the slug decapitating itself, i was surprised in a way i haven't been in a long time.

[@cc_tw]

This is the secret to Wolverine's regenerative ability!

[@Lucita.]

1:33 that's a tiny elden beast XD

[@emordnilap4747]

3:44, hold up, MOST?! You're saying, on top of everything else, this animal has some of it's reproductive organs in it's head? That seems worth more than a passing comment.

[@xionmemoria]

Sir, that is a Pokemon.

[@MoonMoonTM]

5:06 why did this make me laugh? 😭

[@kyle98452]

pls make a video about sea dragons!!

[@hchen-gb1tw]

My god. They really just. Get a parasite and then decide to simply throw the whole body away and start over.

[@infantrypaladin]

Bizarre! So cool. Planimals?

[@tinamoir2450]

.... Here is the green sheep, fast asleep!

[@sethbettwieser]

Sea slug? Nah. Doomslug? YES!

[@Blashswanski]

Crazy to think that self decapitation is not a fool-proof plan.

[@datbadassunicorn2832]

Yessssssss finally a animal plant! ❤❤😢

[@keba193]

The ending of this episode seemed unusually abrupt to me.

[@IlseMulAuthor]

The look so CUTE!!!!!

[@monicareid8858]

My new favorite band name- ⚡️⚡️Kleptoplacy⚡️⚡️

[@LunaC...]

I wish "sea slugs" could get a rebrand.... They are so cute and pretty - could we call them something else?

[@Kotifilosofi]

These are one of my favorite family of animals. What there's to not love about them?

[@stellarcascade7550]

totally random but the music in this reminds me of the club penguin secret agent music

[@jorichner6678]

if there is a next life and I get to choose what I am, this is it

[@BLOODKINGbro]

Making Monty Python Proud!

[@artsheepnz]

My favourite sea creature ❤

[@jasonburguess]

If they can regrow their body's why do I have to go to the dentist! Get on it science!

[@pokeplazagamer]

So kirby slugs.

[@soupnoodle5909]

Real life plant sim

[@mariannetfinches]

Huh. And here I thought Deadpool was fictional

[@marxtheenigma873]

What about nutrition though? How do the seaslug heads get the nutrients needed for rebuilding the body? Yeah they get carbon from the photosynthesis, but theres other stuff they need, right?

[@Isopod_enjoyer999]

they eat the algae, but save the chloroplasts

[@retro6294]

Solar power seems to work better with plants and some fauna than it does with technology. Our planet is filled with exotic life and amazing animals you show us on your channel. And yet, there are people out there who think our world is nothing special.

[@dpr9921]

So, it isn't exactly a decapitation if you lose your body instead of your head. Maybe it should have been called "decorporation" or something along that way

[@sol666]

Ima gettin that pokemon!

[@kraieeng]

i love sea slugs!