According to your knowledge accumulation, what other biological self-protection skills are there?

Protective color black back and white abdomen

Scales or thick skin

Parrot mouth fish! When you sleep, you will spit out a film, seal the surroundings, prevent your own smell from spreading, and effectively prevent natural enemies from being killed!

Poison ~ bright colors! Generally, bright colors warn predators: "I am poisonous", but poisonous creatures have one or two specific natural enemies.

Cooperate with other creatures: for example, there is a kind of fish (I can't remember what kind of fish it is), and with some kind of fright, the fish is responsible for keeping watch, the shrimp is responsible for digging caves, and then they hide in it together! What's more, small fish follow sharks, and big fish is also a sign of seeking protection!

Camouflage! Change the color of your body to a color similar to the surrounding environment! Or bury yourself in the sand!

Electricity! Such as ray, electric eel! Can release a high current! Get rid of your opponent!

Seek asylum! Some small fish, hiding in poisonous anemones, are difficult for natural enemies to get close to!

Distract! Some fish will use this strategy to lure predators away from their nests and protect their eggs! At the same time, you can escape from yourself!

Cluster! Thousands of fish gather together, and a huge externality scares away predators! But this trick doesn't work for veterans!

Escape skills! Some small fish, through sudden acceleration, suddenly change direction and escape from large natural enemies!

Finally! I'm dying!