Innate defense form of fish

There are three forms of fish’s inherent defensive behavior, including:

1. Hidden life: living in caves or crevices. For example, the bearded catfish hides in the dark places and caves at the bottom of the water body during the day; the eel likes to hide in caves at the bottom of the muddy water during the day; the angler hides in the mud and sand on the seabed; The star fish buries its body deep in the sand, leaving only its small, movable eyes exposed. Viewed from above, the mouth cleft looks like a crack on the sand surface. When it is still in the sand, it is difficult to detect its existence. ; Damselfish and double sawfish are often found between the tentacles and body cavities of sea anemones. Young silver pomfrets can hide well under jellyfish, while diving fish are parasitic in the bodies of starfish. These small fish use the coelenterate's Tentacles are used to drive away ferocious fish to protect themselves. Anchovies rely on the large suckers on the back of their heads to cling to the undersides of sharks, whales, turtles and ships to avoid enemy attacks.

2. Concealment: As mentioned earlier in the introduction to the color of fish, in the natural environment, most fish have body colors that are consistent with the surrounding environment to achieve the purpose of concealing themselves or confusing enemies or prey. Some fish, such as flounder, change their body color so that no matter what kind of environment the fish is in, its body color will always remain consistent with the color of the environment. This species with multiple cryptic properties (also known as cryptic polymorphism) can effectively protect itself.

3. Display warning colors: As mentioned before, dangerous or unpalatable species often have bright and eye-catching colors that are very inconsistent with the environment. This is used to warn predators and remind them not to intrude. The beautiful colors of puffer fish are the expression of warning colors.

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