Army of Crabs Protect Spy Robot From Stingray | Spy In The Ocean | BBC Earth

A video on YouTube. In Documentaries, a Krater category.

Summary by Krater

This video shows a stingray hunting crabs on the seabed, explaining how crabs form defensive groups and hierarchies to protect themselves.

From the video

Answers: How do crabs defend themselves against stingrays?

A 4-meter stingray can eat 50 crabs a day.
Crabs with hard shells are ignored by stingrays in favor of softer-shelled ones.
Crabs form an armored fortress by piling on top of each other to protect vulnerable individuals.

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