they are on shrks and dolphins
Porpoises have triangular dorsal fins (as opposed to the curved dorsal fins of dolphins and whales). Some species of porpoise have small bumps on their fins, but the purpose of these bumps is unknown.
There are two Dorsal fins on a perch. The anterior and posterior Dorsal fins.
Sharks have straight dorsal fins, dolphins have curved dorsal fins and whales don't have dorsal fins :)
Yes, giant cat fish do have dorsal fins.
Yes, shark dorsal fins are triangular and straight while dolphin dorsal fins are very curved and streamlined. A Google Image Search will clarify this even better.
dorsal fins
no
Pectoral fins, dorsal fin, and the flukes!
The dorsal fin locates on the back of the seahorse.
yes, they do it is next to their spiny dorsal fin.
dorsal fin
Males have longer pointed dorsal fins. Females' dorsal fins are shorter and round.