Clip | Natural Born Rebels | Episode 2 | Survival - Boxer Crab Fights off Pufferfish

Episode 2, “Survival” premieres Wednesday, May 2 at 8 p.m. on PBS (check local listings)

The boxer crab has an extraordinary method for self defense: it wards off predators using toxic sea anemones clenched in its tiny claws.

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[Narrator] Beneath the waves, amongst the corals ...lives an extraordinary creature ...a sporting super star.

[punch noises] The boxer crab.

In a world where almost everything is big and dangerous a tiny crustacean needs a fool-proof plan to stay alive.

This pufferfish fancies his chances of an easy meal.

But our crab has a secret weapon... The perfect pair of boxing gloves.

A blistering left hook makes this fish think again!

[cheering] And that's because those 'gloves' are in fact sea anemones.

Tiny relatives of jellyfish, they have a cocktail of powerful toxins in their tiny tendrils... Every time the crab lands a punch - The anemone delivers a painful sting.

The puffer fish won't try that again in a hurry.