Mucus
Some parrot fish species, including the queen parrot fish (Scarus vetula), secrete a mucus cocoon, particularly at night.Prior to going to sleep, some species extrude mucus from their mouths, forming a protective cocoon that envelops the fish, presumably hiding its scent from potential predators.This mucus envelope may also act as an early warning system, allowing the parrot fish to flee when it detects predators such as moray eels disturbing the membrane.The skin itself is covered in another mucous substance which may have antioxidant properties helpful in repairing bodily damage, or repelling parasites, in addition to providing protection from UV light
MucusSome parrot fish species, including the queen parrot fish (Scarus vetula), secrete a mucus cocoon, particularly at night.Prior to going to sleep, some species extrude mucus from their mouths, forming a protective cocoon that envelops the fish, presumably hiding its scent from potential predators.This mucus envelope may also act as an early warning system, allowing the parrot fish to flee when it detects predators such as moray eels disturbing the membrane.The skin itself is covered in another mucous substance which may have antioxidant properties helpful in repairing bodily damage, or repelling parasites, in addition to providing protection from UV light
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