Nematocysts Firing

Cells on the tentacles of jellyfish each shoot out a poisoned harpoon when a trigger hair is disturbed. This reaction is the fastest cellular process in the natural world.

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Pedicel Usage

A sea urchin uses its pedicels to maneouver an urchin cookie to its mouth. With happenstance commentary from the caretaker.

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Pedicels Up Close

Sea Urchins of the island of Sulawesi display their pedicels clearly.

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Sea Urchin flipping with spines

The urchin's test is adorned with a plethora of articulate spines, not only making the urchin a pain to eat, but giving it some helpful abilities.

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