Why do some animals have a bright unmasking color, while others, on the contrary, have a protective color?

Bright unmasking color warns that the animal is poisonous, not edible and dangerous. Many coelenterates, marine worms, many insects, and amphibians have this color.
Protective or masking coloration in animals that do not have such features and they need to be invisible so that they are not eaten. Or, conversely, so that the victim does not notice them.



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