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New Video - Blackback Land Crab Smackdown
🕑 Added 2018-11-02 19:00:03 +0000 UTC It's an all-out brawl for prime beach real estate! These Caribbean crabs will tear each other limb from limb to get the best burrow. Luckily, they molt and regrow lost legs in a matter of weeks, and live to fight another day.
On the sand-dune beaches where they live, male blackback land crabs do constant battle over territory. The stakes are high: If one of these baby-faced crabs secures a winning spot, he can invite a mate into his den, six or seven feet beneath the surface.
With all this roughhousing, more than feelings get hurt. The male crabs inevitably lose limbs and damage their shells in constant dust-ups. Luckily, like many other arthropods, a group that includes insects and spiders, these crabs can release a leg or claw voluntarily if threatened. It’s not unusual to see animals in the field missing two or three walking legs.
The limbs regrow at the next molt, which is typically once a year for an adult. When a molt cycle begins, tiny limb buds form where a leg or a claw has been lost. Over the next six to eight weeks, the buds enlarge while the crab reabsorbs calcium from its old shell and secretes a new, paper-thin one underneath.
But how does the crab actually get out of the old shell, and release those new legs? Watch the video to see what happens next!
Hi there, we hope you enjoy a first look at our newest episode. You can start sharing it out if you like from YouTube on 11/6, Tuesday morning Thanks!
Comments
Deep Look
Thanks! Yes, generally crabs regenerate limbs after losing them.
Deep Look
I will check with Elliott, but I believe the eyestalks indeed retract into the protective shell.
Carlos Cabrera
I know this is pretty gruesome to ask, but it seems like they'd attack each other's eyes too. Are the eyes able to retract and protect themselves enough so that the crabs generally don't attack that spot?
Darron Perry Jr
Do all crabs regenerate limbs when they molt? Gonna miss you guys while you're on break!
