For Pacific Mole Crabs It’s Dig or Die | Deep Look

For Pacific Mole Crabs It’s Dig or Die | Deep Look

Chaotic, turbulent, harsh … The ocean’s edge … isn’t the easiest
place to make a home. And yet, someone one does. Pacific mole crabs – also called sand crabs. You’ve probably seen the little holes they
make. They spend their lives just under the surface
of the sand, waves crashing overhead. That ever-present flux offers a meal. Each wave kicks up plankton and other tasty
morsels, like a 24/7 buffet. They peep out from below the sand and use
their feathery antennae to catch food right out of the water. But they can’t just sit around gorging themselves
all day. The crabs want to stay in the swash zone – this
part here where the waves break and sweep in. But it’s always moving with the tides, up
and down the beach. So the mole crabs have to move with it. But they’re not the only ones here looking
for a meal. To birds, they’re basically beach candy
– easy pickings. So mole crabs have become champion diggers. They can disappear in a flash… back under
the sand to hide. But they have to be fast. So, what makes them so good at burrowing? Researchers at UC Berkeley want to find out. Back at the lab, they film the mole crabs
in action using high-speed cameras. Mole crabs actually burrow backwards, digging
into the sand with their pointy rumps. But moving densely packed sand is hard work. The grains stick to each other, making it
tough to push through. So they crabs become tiny engineers. They stir up the wet sand with their tails
making it easier to move. A process called ‘liquefaction.’ Then, they push the loose sand up toward the
surface by handing it off between their five pairs of legs. See? Kind of like a conveyor belt. The waves never rest, so the moles crabs do
this day and night, as they’re tossed and tumbled. But they take it all in stride. When you survive on chaos, fluidity is what
it’s all about. Hi there, it’s Lauren again. Make sure not to miss any crazy behaviors
from the natural world and sign up for Deep Look’s email newsletter. Also, don’t forget to subscribe and click
that little notification bell. Thanks for watching Deep Look.

Comments (100)

  1. These are called water fleas where I'm from

  2. Most people call these sand fleas

  3. I still think hermit crabs are cute though :3

  4. One of my Irish Wolfhounds, Enkidu, used to eat them, they were known as "beach cookies"…

  5. I saw them in swarms

  6. The Doodle-bugs of the sea

  7. PBS nobody calls them mole crabs and they make great bait and we call them sand crabs

  8. What kind of Pokemon is that?

  9. How and when do the sleep?

  10. I love these things 😊 every time I'd go to the beach with my family I'd always dig them up, examine them, and release them back into the wild.

  11. Why didn't they use transparent granules… Better visibility.

  12. These crabs looks like slug or snail


  14. We call them sand fleas

  15. Undur – undur laut

  16. Digging backwards
    Digging forward

  17. In my country we call them michugos

  18. For some reason when i was little i called these guys (the crabs) aliens or E.T.

  19. We call these sand fleas in California… and theyre nasty pretty much only good as fishing bait to us.

  20. They make good bait too. They're called sand fleas where im from in Florida.

  21. Deep look hearts every comment except mine

  22. And there's no creature on earth or bird how fly with his wings except that they are community's like you we have not neglected in the register a thing then unto their lord will be gathered. The Quran 6.38

  23. We extremely thank those loony atheists for producing such stunning nature documentaries that increase and strengthen our believes in existence and wisdom of the almighty Allah.

  24. Imagine if you were at McDonald’s and some giant God ripped the roof off and plucked you out, put you in a tank and pointed high speed cameras at you to watch you sit down to eat

  25. its like a pokèmon wow the footage :0
    me 5 minutes again:Ewwwww nvm im not going to the beach now 🤢🤮

  26. I learned something new! They borrow backwards, 5 pairs of legs and use the conveyor belt method. Awesome.

  27. The feathery antennas, the way they dig the highly densed sand, everything is so perfect.
    How can people still believe its just the work of nature.?! (atheism), for something this perfect to be 'created' there is obviously a perfect creator behind it. A perfect creator who isnt in need of any other partner to assist Him in creating nor does he need a 'son'. The only thing that is stopping you to believe in Him and worship Him is your pride, just look at your body. How perfect it is?!.
    O people worship Allah the one and only, he isnt in need of you, it is us who are in need of Him. Every second you pass by is the chance given to you from Him. Repent back to Him before its too late…
    All those out here mostly have seen many much vids just like these, vids that show about the animals, about their distinct and perfect characterstics. It should be apparent by now that these arent perfect just like that,

    There is indeed the perfect creator who is free from all flaws and whatever partners you ascribe to Him.
    I have done my part keep your pride at the side and understand it whole heartedly.

  28. Video đẳng cấp. I love all

  29. I finally know what these things are called now! I dung one up accidentally when I was making a sand castle with my son. I was a little freaked out because I didn't know what it was and being in Okinawa I didn't know how dangerous it was. Here this whole time it was a crab 😅

  30. I thought that they are called sand fleas

  31. Look likes ant lion

  32. Know what I don't like? Albatross birds. They are so arrogant. They have that "get in your face" attitude.

  33. month after month this is exactly what I do when I see my landlord.😎

  34. I've lived on the California coast my whole life and never knew that the crabs dig in backwards. I always thought that their rear end was their head lol 😂

  35. i usually see kids at the beach chopping them in half with their shovels, they come by the thousands, its gross like having ocean roaches all around your feet and on your blankets

  36. Is it a law of the Internet that the music must be loud enough to make it difficult to understand the voice-over? Otherwise the video maker isn't getting good value from the music rights or something? It kind of defeats the purpose of this kind of presentation.

  37. Has anybody notice when he picked up a crab it tried to,dig through him ;-;

  38. Deep Look is the one of the few worthy watching, I am definitely going to give them like 5$a month I want more of these videos

  39. Their name here in brazil is Tatuíra, which i find it has the coolest sound to pronounce.

  40. Omg…this is the little crabs i keep accidentally squishing…😥😥

  41. New Quest! Go to taiwan byshawan beach and research the coral skeleton

  42. ew I thought they were called sea fleas… tho I have to admit they look less gross upclose (surprisingly).

    …also I've been looking at them backwards my whole life.

  43. Who needs a documentary? Watch these short educational, fun videos from Deep Look

  44. Remember, don’t dig straight down

  45. Sea kakaroach 😆

  46. Fireflies are the first inventors of Heart as the icon of Love… and it glows

  47. it was at the last minute i finally realized this thing is known as "undur-undur" at my country (Indonesia) after seeing the body and how it moves backwards 🤣

  48. I see a hole but its not sand crab it's a baby starfish more like sand dollar

  49. It’s illegal for this channel to have only 1.1million subs

  50. Haha such a random lil animal to do a video about. I love it.

  51. Mr Krabs is eating Plankton? he’s had enough of him stealing the secret formula I gueds

  52. Liquefaction is gonna be how we all get buried alive when the big earthquake happens . It has already happened although it has been labeled 'MudFlood' .


  54. They have peepers😅

  55. In nature, it’s ___ or die.

  56. When do they sleep? And do they sleep under the sand?

  57. The narrator is awful.

    Is Attenborough still alive?

  58. Cmon I can’t be the only person that would always catch these guys at the beach

  59. Haha just dug up some today and showed them to my girlfriend. She was absolutely terrified. Been digging them up since i was a kid, but all this time never knew they were digging backwards. mind is blown.

  60. Osea que el culo de los muymuy eran sus caras?.

  61. How big can this guys get??
    When I saw one in the beach it was half an inch

  62. Wonder if they sleep

  63. I’ve seen this in Miami Beach, or it could be something else

  64. One time I was at the beach looking at tide pools, when I stepped in what I thought was an empty pool. Then one of these f*cks tried to burrow through my foot.

  65. "When you survive on chaos fluidity is what it's all about."

  66. Nice but I yearn for more information

  67. Are they good to eat?

  68. Why they taste bad?

  69. Last month I made a journey with some friends from college, we went to Buenaventura, Colombia and found these little friends. We collect one because we don't know what they are and bring them to the lab to study it and just in time i found this video on my feed. Thank you so much ❤️❤️

  70. That narrator voice … I find it off putting

  71. I remember stir-frying or grilling some of these guys whenever i dont have food to eat 😛

  72. When I was little I found one at the beach when I buried my hands in the sand.
    I felt crawling and I pull my hand out, curious I put my hand back in and sure enough it was a sand crab. I was amaze what I found so I show it to my parents😁😁😁

    I wanted to keep it

  73. Mole crabs are the nature equivalent of "you dont have enough resources to survive in minecraft you just dig a hole and hide in it for the rest of the night"

  74. God is great, He create great things in His wisdom
    Great [is] the LORD, and greatly to be praised; and his greatness [is] unsearchable.

    One generation shall praise thy works to another, and shall declare thy mighty acts.
    Psalm 145

  75. For me it's Get a A+ or die 😂😂

  76. I collect them and put it back in the ocean

  77. N I thought my life is tough 👍

  78. Sand flea. A mole crab wow

  79. I realized I seen these before. I remember putting them on a rock and building walls of sand around the rock to make a home for the little creature.

  80. In other words: Easy fishing bait that’s also free.

  81. I bet they Can’t get cold in Antarctica

  82. I found one of these in my swimming trunks one time after the beach and I almost had a heart attack 😂

  83. Just so yall know the are 1inch long

  84. More like mole cockroach

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