In the open ocean, species of large predatory fish will swim and hunt for food at various depths, which leads to unique diets in these fish.

Jumbo squid that can grow up to 7 feet long and weigh more than 110 pounds is invading central California waters and preying on local anchovy, hake and other commercial fish populations, according to a study published Tuesday.

Though they might not have appreciated it at the time, a group of Antarctic penguins have been recruited as scientific researchers in an ambitious project to gauge the effects of over-fishing and global warming on the Southern Ocean ecosystem.

A New Dragon Among Us, Beware to the LanternfishAstrobiology Magazine -- The earth's biological census currently lists around 28,000 species with a backbone--a relatively small number which now has a new addition. Dr.