A Sand Dollar's Breakfast is Totally Metal | Deep Look
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- čas přidán 8. 10. 2018
- Their skeletons are prized by beachcombers, but sand dollars look way different in their lives beneath the waves. Covered in thousands of purple spines, they have a bizarre diet that helps them exploit the turbulent waters of the sandy sea floor.
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DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Explore big scientific mysteries by going incredibly small.
Pristine white sand dollars have long been the souvenir to commemorate a successful day at the beach. But most people who pick them up don’t realize that they’ve collected the skeleton of an animal, washed up at the end of a long life.
As it turns out, scientists say there’s a lot to be said about a sand dollar’s life. That skeleton -- also known as a test -- is really a tool, a remarkable feat of engineering that allows sand dollars to thrive on the shifting bottom of the sandy seafloor, an environment that most other sea creatures find inhospitable.
“They've done something really amazing and different,” said Rich Mooi, a researcher with the California Academy of Sciences in San Francisco. “They’re a pile of novelties, and they’ve gone way off the deep end in modifying their bodies to adapt to where they live.”
Mooi studies echinoderms, a word that roughly translates to “hedgehog skin.” It’s an aptly-fitting name for a group that includes sea urchins, sand dollars, sea stars and sea cucumbers. But Mooi says sand dollars really have his heart, in part because of their incredible adaptations.
--- What are sand dollars?
Sand dollars belong to a group of animals called Echinoderms that includes some more familiar animals like starfish and sea urchins. Sand dollars are actually a type of flattened sea urchin with miniaturized spines and tube feet more suited to sandy seafloors.
--- What do sand dollars eat?
Sand dollars consume sand but they get actual nutrition from the layer of algae and bacteria that coat the grains, not the sand itself.
--- Are sand dollars alive? Why do they Turn White?
When sand dollars are alive, they are covered in tiny tube feet and spines that make them appear like fuzzy discs. When they die, they lose their spines and tube feet exposing their white skeleton that scientists call a test. That skeleton is typically what people find on the beach.
---+ Read the entire article on KQED Science:
www.kqed.org/science/1932072/...
---+ For more information:
Learn more about Chris Lowe’s work with plankton including sand dollars and their relatives
lowe.stanford.edu/
Rich Mooi’s research into sand dollars for California Academy of Sciences
www.calacademy.org/learn-expl...
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---+ About KQED
KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media.
Funding for Deep Look is provided in part by PBS Digital Studios. Deep Look is a project of KQED Science, which is supported by the Templeton Religion Trust and the Templeton World Charity Foundation, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Fuhs Family Foundation Fund and the members of KQED.
---+ SHOUT OUTS
Here are the winners from our episode image quiz posted in our channel Community Tab:
/ @kqeddeeplook
🏆#1: Tektyx
Was the first to correctly ID the creature in our episode was a sand dollar.
🏆#2: tichu7
Was the first to ID what kind of sand dollar it was, the Pacific sand dollar.
🏆#3: Miguel Gomez
Also posted what kind of sand dollar it was was, but by another name: Eccentric sand dollar.
🏆#4: Gir Gremlin
The first viewer to identify the sand dollar by its scientific name: Dendraster excentricus! - Věda a technologie
_forbidden_ _cookie_
A tough purple crawly 🍪
Ben Staunton *CRONCH*
mermain goblin do a crunch
YOU CAN'T HANDLE THE CRONCH OF THE SAND DOLLAR
Cursed comment
"Like a big pile of purple sea cookies"
That is just too cute. I will never see them as anything else now.
Furry sea macarons
Pam it's the cutest description I've ever heard 🤗
@@garchomowner Yours is pretty good too 😉
Purple, so it's sweet potato flavours I guess? Lol
That kinda made me feel a lot less uncomfortable when seeing a live sand dollar. (The bristles are kind of creepy looking)
*"SO BEING FLAT IS AN ADVANTAGE"*
I Can't Believe I Saw This Type Of Comment In Here 😂
can't believe im thinking of my being flat chested to be associated with this comment.LOL
-Every Loli Ever
😂😂😂😂😂😂😂😂
Was gonna say that too hahaha
I never thought such a simple looking creature would end up being so fascinating and complex.
look in a mirror
I wish people would have said that about me when i ate sand.
😆
I made a shockwave here. czcams.com/video/UHeTcLrZjF4/video.html
welcome to marine biology
That's why we should always stay humble :)
"Turns out, takes a lot of work to lay around"
Found my spirit animal right here. Thanks Deep look!
James Bond the water bear is my spirit animal, because I just want to shrivel up and lay dormant for years
Lol mine is the spider.
I like being alone and working alone like most spiders with their webs and after suddenly working very hard for a short amount of time I like to just lay there doing nothing until I really need to.
Our spirit animal is the spider! We ate our mother.
@@centipedeouttogetyou7763 that's nice.
@@derpychicken2131 uhh... She wasn't even that good (too tough)
This is the kind of quality you don't find on TV anymore 👌
Uhh... Nat geo wild, Animal planet...
First_Killer C-OPS exactly, all they do know is show us the weirdos of the world, and the closest thing to the animals documentary is 6 minutes about dogs and cats
Lamo wild channel
The fish communist republic of FISH XD
This says a lot about our society 🤔
“Turns out, it takes a lot of work just to lay around”
Mood.
... and watch sand dollar videos
I’ve said this for years!
like a good government worker !
your dp is weird
Random sea explorer: WHAT IS GOING ON HERE!
Sandollar: *BEKFIST!*
Jeremiah Plays All ☠️☠️
Yeah
THAT MEMES IS SO OLLDDDF
I made a shockwave here czcams.com/video/UHeTcLrZjF4/video.html.
@@birbs4755 Old is gold. ;)
It's weird we call them dollars instead of cookies or kachings.
In Portuguese they're usually called "Bolachas-do-Mar" - Sea Cookies! No idea why you call them Sand Dollars though :v
I prefer sea cookies too, or biscuits. I think people thought their bleached skeletons washed up on the beach looked like silver dollar coins from back in the day. - JoshC
Deep Look Oh wow i was thinking about that too! I just didnt know where to tell it :/
Yeah, but they do indeed have that nickname! So they kinda already are sea cookies!
I wonder why don't the Spongebob universe uses literal sea cookies for money? That would make Stephen Hillenburg prouder.
Do mermaids put sand dollars in their mermaid’s purses before they go shopping..?
No, they use a credit carp.
+1
@@KQEDDeepLook lol
No. Sand dollars get thrown on stage as mermaids work.
They can also pay with silver dollars (Metynnis).
“so being flat is an advantage”
*thank you*
uwocado I don’t get it TwT
@@yonniebetanio7220 ur too young to understand
@@thatdude1181 i get it now :>
Very well my young cricket
Flat IS justice, afterall.
What insect did they hire as cameraman?
Probably a Mantis shrimp
edit this is probably the first like i'v ever gotten
Raggity
Easy: Jiminy Cricket 🐚🎥🐜
Ants on Sea-Doos
Invmy theory, it was a crab in the end that filmed them. You know why? Because in the end of this video, the narrator asked, "Wanna how we got so close and personal to these animals?" And then it showed a crab going away. There's no doubt about it.
Fairy fly
Is this video sponsored by sand dollar shave club
O oO oOooo oooOOO oO oooo oO oO oO O Oo Oo ooo oooooooooooooooooo
Haha good one
OOOOOoooOoOoOOo i want the sea urchin perfume pls :3
I think this and all it would hate it if you shaved it
😂
The way the narrator said "cookies!"
Omg im dying to that beautiful second of time
Ok? so extra
Okeh Bru Did ya really have to comment that? Because I’m not sure.... but that might be a little bit extra.
Real sand eaters know that not all sand tastes the same😤
just like not all playdoh taste the same. Purple is best.
Yeah, but in my opinion, the yellow colour tatstes better.
Smh so true queen 🙄💅
Wha-
They should be called Sea Cookies.
Sea is for Cookie, that's good enough for me!
...I'll take my leave now.
Ohhh cookie cookie cookie starts with Sea
When i was kid i ate one of those
I see pic, looks like Eucharist, I click ;)
Thank God.
How do those convert to sand pounds?
You should if you're trying to build a solid foundation.
This section was actually pretty clever.
You can try sea urchin shop
badly
A couple kilos
I’ve been wanting to know about sand dollars and you guys delivered! There was so many things I learned about them. When I first saw them, I thought they were just shells found at the beach. I did not know they were living creatures. The video is beautifully filmed and thank you for continuing to give us great content! Looking forward to seeing more videos from this channel!
Bring them to the Dollar store
All shells belong to a living creature though.
PBS delivers. Id buy that for a Sand Dollar!
Jonathan Bondoc @
As a child, I thought they were literally money.
I love the fact that you manage to explain something so well in such a short time!!! And glad to see the channel is finally getting the recognition it deserves, such fun and interesting facts with amazing detailed filming
Thanks!
Sand dollar: Eats metal
*Death metal starts playing*
I thought the title said sand dollar breakfast and I guess eating sand dollars is kind of metal?
Lol
They are full of iron (magnetite), so, yeah.
Same
Same
Same
Sand dollars...! I haven't even heard about them untill now. I'm more than thankfull to u guys. This channel is the best thing happened to me in youtube
Take a walk on an ocean beach sometime, lots of cool things wash up.
Some of them don't even smell bad!
Me neither
Same,I've never heared about them before.
@@Hashishin13 its odd to me that people havent heard of sand dollars. I live in california so we see and hear about them all the time. I thougjt they werw pretty common
@@Hashishin13 not all region have this creature
In my country Indonesia, I never saw this thing.
Monterey Bay Aquarium has a beautifully designed dome display with live sand dollars feeding.
I just discovered this channel today. I am already in love! They go so in depth into not only what the creatures are doing, but why and how they do it. I have a short attention span but these captivate me. Plus the narrator's voice is really soothing and flows great with the script.
Thanks, Tania! Welcome. 🙏
macro lens: the channel
This comments has many likes but no comments sooo i will comment then
@@delin8597 This is comment what i’m here is reply.
@@judicatorhurayth1927 *to
Quality content, original, interesting and immersive, that's what I call a channel that deserves my sub. Thanks Deep look!:)
Hcildwold the audio is really good
Awesome work Deep Look!
Narrator: *Sea Cookies*
Me: *I WANT SOME*
You guys should totally do a video on the Greenland shark. They're interestingly ancient
maybe if they can even get close enough to one
Getting close enough wouldn't be the problem, finding one would.
Yeah one of them is 500 years old
One of them is 500 yrs old and literally was here since the 1500s
Mud Puddle oh u already said it...
"Takes a lot of work just to lay around"
Don't even tell me about it
Ikr!!!
3:52 THAT IS WHAT I KEEP SAYING!
BUT NO ONE BELIEVES ME!
Lamo
What an awesome video! The narration made it so incredibly mesmerizing
I wonder how many sand dollar skeletons need to be collected to be able to refine 1 kg of iron?
Shh, don't give Cody'sLab any ideas
@@Ie0n1 hahaha nice, would be a cool Cody's Lab video though :D
I suppoert that
Someone get Cody'sLab right now.
Hey at least they would not collect live ones not dead ones.
Thanks for the shout out! I got the chance to see a live sand dollar for the first time on Vancouver Island back in July and I just remembered all those little hairs. And I found a few beautiful skeletons to bring home with me. They really are special, but also fragile.
Tektyx you can strengthen the tests by brushing them with a mixture of water and Elmer's glue. It soaks in and makes them less fragile.
When the kids were little, we used to race keyhole sand dollars. We would find them as the tide went out. Then we’d dig a shallow hole, and each of us would pick one, line them up, and whoever’s sand dollar buried itself first won the race.
(I’ve never tried the Elmer’s glue & water method, but it sounds legit. I’ve used clear nail polish to strengthen the skeletons.)
Why didn’t she mention their teeth? They each have 5, and they look like bird silhouettes.
I love how Deep Look can make scary looking animals look so adorable. Much love!
Thank you so much, Deep Look, for these wonderful, amazing nature videos!
You are welcome.
nice, no likes, but a deep look reply
So are sand dollars magnetic?
Ffin sand dollars, how do they work?
czcams.com/video/8bhYMnHb5JY/video.html
@@ObjectsInMotion Oh, they have a good point. A lot of pop science is full of b.s. They still think the sun is powered by gravity and heated via convection, like an oven, lolz, even tho it's obvious its hottest layer is actually the outer plasma layer governed by electric forces, which are far stronger than mere gravity anyway. How many binary star systems discovered will it take them to realize gravity cannot explain star formation.
Ha you think stars are powered by electricity? Like a hair dryer? Love it when armchair physicists think they're right because the answer is so completely obvious.
@@ObjectsInMotion Have you ever seen lighting? "Armchair physicists" are called theoretical physicists and they don't know squat about laboratory experiments with plasma, nor what it means to do actual science. So when they discover anomalies, they don't question their beliefs or models but instead fumble with patchwork trying to fix their sinking theories in light of new observations.
Informative yet succint-ly put! Love the voiceover, super chill and sweet ❤👍
I love seeing all those spines up close! Just as a side note, depending on where you live sand dollars can look very different. In Florida, they are not purple and maybe because the spines are shorter, people think they are dead and remove them from the water. Please don't. Most of the time, these animals are still very much alive and want to stay in the shallow waters near the shore.
This video answered so many questions for me. So cool. Thank you.
*Headbanging Commences*
This is so beautifully filmed- each shot is absolutely stunning. Always look forward to quality content, Deep Look!
Purple cookies... nom... wait...😀
Yet another Deep Look video I wish I could "thumbs-up" more than once!
I love every content of this channel, my gosh! even the narrator's voice sounds so smooth
You deliver us the most fascinating non-mainstream animal documentaries. I love you guys for that.
God, this episode was so beautiful I thought I might cry. You guys absolutely knocked it out of the park on this one. This is a perfect example of why Deep Look is my favorite show. The detail was extraordinary. Thank you again so much for working so hard to be able to capture and show us the incredible beauty of the natural world, especially the subtle, smaller sides. Magnificent. I wish I could meet all of you, if only to shake your hands and thank you in person for the work that you do.
Thank you Mark!
Ah, I’m so glad you liked it. I was worried it’d be a hard sell when I pitched the episode to get made. I think they’re amazing, but I’m a marine scientist who studies inverts! :)
Another amazing video! I always have the same face of surprised intrigue while watching every one lol I always learn something cool, thanks guys!
Another beautiful and interesting video, superb job guys!
Thank you Mikel!
"so being flat is an advantage"
Me and my girl knows it better 😂
May I know what's the hidden meaning?
@@rahuldhargalkar wow ur dense xD
Ur profile is litteral bust out
@@rahuldhargalkar only girls understand xD
@@Eryan724 well thanks (:
Really enjoying your videos and been a subscriber since the beginning keep it up guys. 😉
Thanks!
Kurzgesagt and Deep Look are basically the best teaching channel ever
Oh boy there are so much more.... Deep look is not really teaching you anything. Yeah it's nice and interessting but the amount of input is small and asking you one month after watching this video what did you learn about Sand Dollars i don't think you remember one thing which was featured in this episode. Yeah deep look is really nice, but like the chanalname says, it's just a deep look. You want to learn something about animals ? Watch animalogic or what else 😜
I've seen fields of sand dollars in the Monterey Bay area while scuba diving. It's amazing to see them moving around and huddled together.
Keep it up guys, lovin the content!
Thank you for that, I always wondered what they we're, found a few on the Beach before, and even bought some, thank you for sharing, I wish I still had those, one's I had, you could shake them a little, they rattled inside
This is by far the best channel i have ever come across. Camerashots and resolution are high quality, and so is the audio. Nevertheless, a lot of research goes into every video, and so we get accurate information. This is coming from a biology student.
"It takes a lot of work just to lay around." This line have touched me on so many levels.
Title: breakfast is totally metal
Me: they actually eat metal, right?
Vid: they eat metal sand.
Me: high five! Got it!
I don’t get it
spiciestt how small of a brain do u have to not get this
@@anawfulperson I mean, they could very easily just be a non-native English speaker. How many foreign language idioms and puns would you get?
Sand dollar goes in - sand dollar goes out. You cant explain that.
One of your best videos
Sand dollars are just a sea animal version of my kid self eating sand.
The background sound is like my alarm and it's making my anxiety go 📈📈📈📈📈📈
Hi I'm new here and I love you channel because you help me get a lots of knowledge about the different organisms out their I love you guys and support you all
This is a great video!
Ty deep look for these interesting videos. They're very good! ❤❤❤
Pile of purple sea cookies! 😄😄😄💜💜💜
Yum.
so that’s why they’re called “sand” dollars
This is so interesting! It's nice to learn more about live sand dollars.
That's absolutely incredible!!!
I saw the early announcement and was pretty excited to see what you guys where going to show us about them! As a marine conservation scientist, I have a very personal interest in the marine episodes you produce, but that's not to say I don't like all of the videos!
Widget what’s a marine conversation scientist?
"Like a big pile if purple sea cookies"
I love that
Outstanding video
Another great video, your amazing!
I thought some food critic will eat/taste some sand dollars for breakfast im sorry.
In love with her voice 2😍😍😍😍😍😍
this is so beautifully shot! i never even knew these creatures existed
Amazing! I saw the beautiful Sand dollars at Pakarang Beach 15 years ago and now I found out what it was!
Very nice...may I know how they produce offspring???
Check out this episode about how sea urchins get it done. Sand dollars are basically a type of sea urchin czcams.com/video/ak2xqH5h0YY/video.html
Like a big pile of purple sea cookies.
Good job deep look you made me hungry
Solid wholesome content!
Very interesting story and high quality video.
2:40
*points at everyone whose ever called me flat* HAHAHA LOSERS >:D
Hairy baby
It takes a lot of work to lay around.... priceless quote
Wow this channel is awesome
When I was young my mom told me about sand dollars when I found it at the beach
Me (young): mom what's this?
Mom: oh you found a sand dollar
Me (young): can you use it?
Mom: you can take decors out of it
Imagine stepping on one of those
i would die of both fear and disgust. maybe it's just me but they look so scary
Only Deep Look can make sand dollars interesting!! I love this channel
Thanks!
De mis canales favoritos! Muchas felicidades!
I've seen enough hentai to know where this is going.
U r doing such detilised videos. Hi from da biologistic class abroad Russia.
privet tovarisch
...just found you.............awesome videos...great content...thank you
I feel like once every month or 2 I forget this exists and click on it again. Every time, it’s a whole new video until I get half way through and remember that I’ve seen it before
One if the better nature videos I've seen.
Sea Urchin: “But what if I was flat?”
Sand Dollar: “Got u fam.”
Very interesting ... thank you!
Simply amazing !!
i always collected these as a kid atleast the smaller ones, they looked awesome
That close up of the sand moving across the tube feet was so cool
That explains all the pores on the surface of sand dollars!! Thank you, I found a sand dollar on the beach several years ago, and I have been wondering about the hundreds (thousands?) of tiny holes ever since.
I think i'm addicted to your videos.