Clownfish Living in Sea Anemone Video

Although the sea anemone can kill fish that touches it, the clownfish seems immune to its poison.

One theory is that a young clownfish builds up immunity by gently brushing against the sea anemone and being stung mildly. This causes the clownfish’s body to secrete a special soothing, protective mucus as a reaction to this. In the process it is possible that some of the sea anemone’s mucus acquired with the sting is incorporated into the clownfish’s mucus better helping it mimic the sea anemone’s own mucus chemistry. The clownfish now covered in its protective mucus amour, does not trigger the nematocyst discharge response in the sea anemone. It can then swim through the tentacles the sea anemone with ease, living in a well-armed fortress protected against predators.

Related Article: Clownfish — The 'Nemo' Fish

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