Both had long tails to counterbalance large skulls, and, proportionally, they had the smallest forelimbs of any apex predator.

NEWYORKER: Bones of Contention

Researchers say the shape and proportional size of the brain resembles that of another "apex predator": the great white shark.

BBC: Arctic sea monster's giant bite

Sharks predate dinosaurs, and millions of years of evolution have positioned them in a critical and vital role as an apex predator.

CNN: Even after attacks on humans, sharks should be protected

Many cetaceans are among the apex predator species first to go from an area if things are not right, so if we can protect whales and dolphins, we know we are on the right road.

BBC: Saving the seas for marine mammals