They swim in schools.
Some have colors that help them blend in to their surroundings. Others change colors to match their surroundings. Some swim very fast to escape the danger. Some fish swim in very tight schools to confuse other fish. Some fish hide in the rocks and plants so the bigger fish cant get to them. Some fish can hide in poisonous anemonies and they are not affected by the poison but other fish are.
No. Fish can not knock themselves out, but they can get stressed out from hitting their head on their tank.
they dont
they can't.
fleeing.
they swim away
to protect themselves
their mouths
they protect themselves from larger carnivorous fish by hiding among the tentacles of Sea Anemones- which would sting and eat the larger fish... The Clown fish is immune to the Sea Anemone's stings.
Bass feed on insectlarvae ,crustaceans, and fish smaller than themselves.
Most fish just swim away or hide.
A Siamese Fighting Fish can see its reflection in a mirror.
how do oarfish get their food