Blue Shark Prionace glauca Blues are named for their blue coloring. Blue shark sketch. Slender body, with a blue back and white bottom. Dorsal fin is well behind pectoral fins. Has a nictitating membrane to protect the eye.
Body gradually tapers into tail.
Pectoral fins are long , swept back. Tips are usually pointed. Typical sharks tail with upper tail much longer than lower tail. Blue Shark Stats Fork length pounds 10 feet 405 lbs. The male and female blue sharks separate after breeding, and the big males, some of them world record size, trickle into Mass. Bay in early July, and reach fishable numbers in late July.