A small creature like sea urchin can sometime kill sharks.How?

Dear student, 

Sea Urchin ( also called sea hedgehog) are small, round shaped omnivores animals that has spines on all its body. They are found in both shallow and deep water. These animals posses tiny jaw like structure called the pedicellarines, used as their defense mechanism . These pedicellarines clasp onto the skin of the predator and thus release a painful poisonous protein into the body which results ‚Äčto severe muscle spasms, faintness, difficulty breathing, and death.

Regards

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