Black-blotched porcupinefish has inflated its body while swimming

Predation defence

Predation defence comes in many forms: physiological, anatomical and behavioural. Physical defences such as spines and armour are obvious adaptations, but other defences can be more subtle and surprising. Whether it's avoiding detection through camouflage and mimicry, chemical defence through being poisonous or exuding irritants, it's all about one thing: avoiding being eaten. Some animals rely on increasing their chances of detecting predators by living in groups and using alarm calls to warn each other of danger.

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Animals with this behaviour





Cartilaginous fish

Ray-finned fishes




Crabs, shrimp and krill

Snails and slugs


Sea urchins


BBC News about Predation defence

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