All of the following are adaptations of tuna for fast swimming except:
A) warmer than ambient body temperature.
B) retractable pectoral fins.
C) rounded tail.
D) operculum that lies tightly against the body.
E) sickle-shaped tail.

Question

Quizplus · Accepted Answer

A rounded tail is not an adaptation for fast swimming in tuna. Rather, tuna have a crescent or sickle-shaped tail that allows them to move through water with minimal drag. The other adaptations listed are all advantageous for fast swimming: maintaining a warmer than ambient body temperature allows for faster muscle contraction; retractable pectoral fins streamline the body; an operculum that lies tightly against the body creates a smooth surface; and a sickle-shaped tail provides propulsion.

All of the Following Are Adaptations of Tuna for Fast