The head helps the fish breathe, eat, and see. The nostrils and gills allow it to breathe, the eye helps it see, and the mouth helps it eat. Fish have very fragile hearing. Their ear is impossible to find because it is in a chamber on either side of its head.
Fish can hear sounds under the water pretty well but out of the water they have very little hearing.
The trunk is in the middle of the fish and holds the meat and internal organs. The pelvic fin is in the trunk area as are the pectoral fin and the dorsal fin. The tail is the most important part of the body because it allows the salmon to swim. Fins help the king salmon move by pushing the water. The fin is a movable structure that helps a fish swim and keep it balanced.