Dorsal fin description?

Dorsal fin description?

• A. Fin on the underside behind the gills; helps balance.
• B. Pair of fins on the sides used for steering.
• C. Fin on the back providing stability.
• D. Tail fin used for propulsion.

Answer: (C)

The back fin on a fish is the dorsal fin, and its main job is to stabilize swimming. It helps keep the body from rolling side to side, so the fish can swim straight and hold its orientation in waves, currents, or during turns. Propulsion comes from the tail fin, while steering and maneuvering are primarily handled by the side fins. Some fins on the underside contribute to balance in other ways, but the dorsal fin’s standout role is providing stability along the body’s length.

The back fin on a fish is the dorsal fin, and its main job is to stabilize swimming. It helps keep the body from rolling side to side, so the fish can swim straight and hold its orientation in waves, currents, or during turns. Propulsion comes from the tail fin, while steering and maneuvering are primarily handled by the side fins. Some fins on the underside contribute to balance in other ways, but the dorsal fin’s standout role is providing stability along the body’s length.