They do all the things that are necessary in life. They are born, eat, breath, excrete, grow, mature, breed, decline and die.
swim?
A pond
Fish suit their environment because they can breath under water by extracting oxygen through their gills.
the environment in which the fish lives
Fish adapt by swimming really fast
No, the fish in Antarctica adapt to the environment's temperature.
No, they are part of the environment. They mainly eat fish, so they compete with other fish-eating animals.
Animals (fish) live in the ocean, which makes it an environment.
The fish!
Many of the Cichlid type fish will destroy any plants in their environment but the vast majority of fish prefer a natural environment with living plants
because it shall
migrate
We can't.