Explorers on a submarine at a depth of 2,461 feet had quite a shock when a group of massive sixgill sharks decided the sub ...

The bluntnose sixgill shark, scientifically known as Hexanchus ... and other marine life that share its remote habitat.

Sixgill sharks are a primitive species of shark that ... they then form a reef and provide a habitat for worms and filter feeders. Since it’s hard to find a dead whale on the seafloor ...