Blue sharks are considered to be dangerous and are thought to be responsible for attacks on ship and air disaster victims.
The largest recorded blue shark was 3.83m, but females average 2.76m and males 2.46m.
This species has a bright blue body, with a white underside. It has a pointed snout with long pectoral fins (on the side of the body) and a streamlined body. Blue sharks have triangular, serrated teeth and large eyes.
Blue sharks inhabit deep water in tropical, subtropical, and temperate seas worldwide.
They are voracious predators, feeding on schools of fish including anchovies, sardines, herring, and squid.
Blue sharks are a nomadic species and can travel hundreds of miles each year. They often gather in large groups. They are considered to be one of the fastest fish.
Females give birth to 25-50 pups, (although once, a litter of 135 individuals was recorded) after a gestation period lasting 9-12 months.
Blue sharks are classified as Lower Risk by the 2000 IUCN Red List.