Scales are the fishes protection and they serve the same/similar purposes as fur or hair in mammals. The fins are used for balance, propulsion/locomotion and display as are the limbs in mammals
gold fish have 7 fins
There are two sets of "paired" fins. The ones on each side of the fish behind the gills are the "Pectoral Fins" and the ones in front of the fishes vent on the underside of the fish are the "Ventral Fins". Sometimes these fins are wrongly refered to as "Pelvic Fins".
no fish are animals that have only 2 fins
Correct
Thats how they swim
Pectoral fins.
the other birds used their fins with sharp beaks and talons,
its protection is the slime on its body
It is the theory that paired fins arose in jawed fishes from the evolution of ventrolateral skin folds in jawless, basal fishes. The folds then separated and specialized to form the paired pectoral and pelvic fins in more evolved fishes.
Bats are mammals like you and me, hence, have anuses.
They swim, they have gills, they live under water, they are sea creatures. They have fins, they travel in schools, they live underwater, and they have scales. Most fishes have gills, fins, and scales. Their skeletons are either made of cartilage and bone. they are cold blooded