Image
Prionace glauca
Maximum length: 3.8 m (~12.5 ft)
Diet: Fishes & squids
Lifespan: ~30 years
Key features: Deep blue coloration on topside, bright white underside, round black eyes, long & sleek fins
Fun fact: Blue sharks inhabit every ocean except for the polar Arctic and Southern oceans. Highly migratory, they can travel thousands of kilometers, with many arriving offshore of Oregon around summer.
Image
Here's a rare glimpse of a blue shark filmed from the remotely operated vehicle (ROV) Ventana at 290 meters depth. (Source: Monterey Bay Aquarium Institute)