It is estimated that the first motile eukaryotic organisms began to appear some 800 million years ago.
3.6 billion years comb-like simple animals, not plants, first appeared in ocean depths in which light could not penetrate.
all seven seas
The word for swim for a fish is "swim." Fish swim by moving their bodies and fins to propel themselves through the water.
Yes fish can swim.
A catfish would be an example of a fish that can swim.
Fish can swim in any direction.
to help the fish swim and float
the only fish that doesn't swim is none. only the mudskipper can go on land
One fish that should not swim in ponds is the Stonefish.
Pikes are a breed of fish.... all fish can swim !
all of them
There are certainly aquatic animals that can't swim, such as the clam, or the adult barnacle (and even then, the larval form of the barnacle does swim) but you wouldn't really call anything a fish if it couldn't swim. Fish swim.
Fish swim in schools.