Quick Facts:

• Although the blue shark is known to be slow and lethargic, they are also one of the fastest sharks in the world. Ranking as the third fastest shark, they can reach top speeds of up to 40 kilometers per hour.

• Blue sharks will eat any time of the day, but are most active at night.

• These sharks are the only known non-filter feeding species known to eat krill.

• Each of the blue shark's sharp, triangular teeth are replaced every 8 to 15 days.

• Due to the aggressive mating ritual, the female blue shark has skin over twice as thick as males. The females' thicker skin may allow it to cover more territory than males as it gives her greater tolerance to colder waters.

• The blue shark prefers cooler waters between 53.6 and 68F. In warmer areas, they will dive deeper to the cooler waters.

• After the gestation period of 9 to 12 months, female blue sharks give birth to live pups in northern waters.

• The average of each litter span between 25 to 50 pups, with each pup measuring from 15 to 20 inches long at birth.