Whack! Jab! Crack! It’s a Blackback Land Crab Smackdown | Deep Look

by birtanpublished on August 23, 2020

Hi there it's Lauren you're about to watch the last deep look of 2018 if you want to get the inside track on what's coming in January join our community on patreon link in the description thanks to curiosity stream for supporting PBS Digital Studios

Scoring that prime Beach spot can be tough everyone's fighting for the best real estate these black back black back land these crabs come from the Dominican Republic

They live in dense colonies on the beach each male establishes a territory and defends a borough with a pretty impressive set of claws those claws have serrated edges and they sure can pinch the goal here is basically to tear your

Opponent limb from limb every joint is a potential weak spot this guy is already at a disadvantage with that broken claw his flanks open to attack when his opponent goes for a leg

Youch but don't worry it's not as bad as it looks for him see how the leg comes off cleanly right here there's a scene where two of the upper leg segments meet he let it go on purpose that's how these crabs cry uncle

By the end of the fight he's lost six of his eight legs awkward he can barely get back to his den like the rest of the crabs do at the end of the day but he's not stuck that way losing legs is pretty normal around here

Within a week they begin to regrow new limb buds sprout in the open sockets of his shell each is a complete leg and miniature all coiled up inside a thin sack but to really get back on his feet the crab will have to start fresh

Don Michaels at Colorado State University studies what happens next the process called molting crabs where they're hard skeletons on the outside but underneath their soft bodies are always growing so they have to go

Through one crazy-looking growth spurt normally it happens about once a year but this is an emergency for the next eight weeks in its den the crab secretes enzymes under its shell that start the separation process and it begins to

Build a new shell in a paper-thin layer under the old one then the crab packs up and moves out he gulps air into his body to create enough internal pressure to pop the top of his old shell then he slides himself out the back and unfurls

Those new legs his body is still flexible in a restaurant he'd be called soft-shell crab right now a couple of weeks and his new shell will harden then he'll be ready for a rematch

As in black back land crap payback thank you to curiosity stream for supporting PBS Digital Studios curiosity stream is a subscription streaming service that offers documentaries and nonfiction titles from

A variety of filmmakers including curiosity stream originals in the health of our oceans renowned marine biologist dr. Sylvia Earle reveals how the growing threats from ocean pollution and overfishing could create devastating

Consequences for mankind you can learn more at curiosity's dream.com slash deep look and use the code deep look during the signup process so the glam that actually controls molting is in the crabs eye stocks which explains why

They're so well protected looking for more videos to spark your love of learning check out a new mega playlist for the PBS Digital Studios Network updated every week linked in the description thanks

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