EVERYDAY SCIENCE

Detailed explanation-1: -The top fins are called dorsal fins. If there are two dorsal fins, the one nearest the head is called the first dorsal fin and the one behind it is the second dorsal fin. The belly or lower part of the fish is the ventral region.

Detailed explanation-2: -The dorsal fin is located on the top of a fish along the back between the head and tail. A fish may have a single dorsal fin or two connected or unconnected fins. The anal fin is located on the underside of the fish in front of the tail fin by the anus or vent.

Detailed explanation-3: -Dorsal describes the direction towards the back, or spinal region. Both the soft rayed and spinous dorsal fins are dorsally seated on lepomids. In the supporting image, it is correct to say that the premaxillary is dorsal to the dentary. Ventral describes the direction towards the belly.

Detailed explanation-4: -The dorsal fin is located on the top of a fish (as well as some marine mammals). Predominately, the fin is used to stabilize fish in the water and help direct the fish through turns and stops.

Detailed explanation-5: -The head of a fish includes the snout, from the eye to the forwardmost point of the upper jaw, the operculum or gill cover, and the cheek, which extends from eye to preopercle. The lower jaw defines a chin.