it help seal swim faster
Every fin a fish has is there for a purpose. Of course the pectoral fins help them swim. They can also be used as brakes.
no they need the fin to help glide through the water
no a shark can not swim without it's top fin
Fins have a stabilizing role; they help a dolphin to swim in a straight line.
The Sunfish needs his fins as his the heaviest fish in the whole world it is up to 1000 p so it needs it fin to swim faster to escape from his predators.
Swim
To maintain directional stability (steering) while moving through the water.
they swim
They can swim fast
yes
swim in the sea
they swim deeply and far away.