Because they feel like it and that's how they were made.They also have tails because that is the ways the move forward and backward and the way they ca steer there way though the ocean and rivers on there long journey
the tail's for power and i think the fins are for like steering
Probably, dorsal, ventral and tail fins.
Tail , fins and body.
Scales, gills, fins, tail, streamlined, cold blooded
They both help a fish to move
fins and tail fin
To swim..? If you mean the fin on top of their bodies then it helps stabilize them.
AnswerBy swimming. The fish uses it's tail muscles to pull its tail back and forth propelling the water out of the way. Did you know that the faster-swimming fish generally have a smaller gap in their tail while slow fish have a bigger gap?Fish move by oscillating their fins and tails. It is a very efficient form of transport in the water.
no usually just the tail , the other fins are for steering
mouth or gills
Guts, fins, tail and eyes.
by looking done where the tail or fins are