They have extremely well developed pectoral fins that allow for greater stability and maneuverability in catching fast-moving prey.
Most sharks swim continuously.
Because they lack swim bladders, sharks sink to the bottom when they stop swimming. In addition to a strong sense of smell, the shark gathers information with special sensory receptors in a series of fluid-filled canals that run the entire length of their body. These nerve endings are used to decipher information such as salinity, pressure, temperature, and electrical currents from the shark's surroundings. The bonnethead is one of twelve species of hammerhead sharks, named so because of the large wing-like expansion of their heads. There are several theories to explain why these sharks have developed such a unique head.