The fin on the back of an orca is called the dorsal fin.
the female orca's dorsal fin is curved and the males dorsal fin is straight
Male orcas have huge, triangular dorsal fins that can grow up to six feet in height. Females and younger orcas have smaller, curved dorsal fins. See the picutre in the link.
To maintain directional stability (steering) while moving through the water.
Orcas, also known as Killer Whales, have dorsal fins. Beluga whales do not.
well the females live up to 30 years and males live up to 50
The dorsal fin is the fin on the back of a fish, for example the typical triangular fin on the back of a shark is its dorsal fin.
About 8,000 pounds and 28 feet long these Dolphins (Yes they are not in the whale family they are Dolphins) have 2 Pectoral fins (flippers), 1 upright dorsal fin and 1 fluke (tail)
On a dolphin and most fish the fin behind the dorsal fin is the tail fin. Some fish, such as knife fish, have no dorsal fin or tail fin. Dolphins of course are mammals, not fish.
The female killer whales dorsal fin is shorter then the males. The male killer whales dorsal fin is about 6 ft tall
No, a dorsal fin from a fish is on its back area.
The fin on the top/back of all fish is called the "Dorsal Fin."