Aquatic creatures of very different sizes swim at the same relative depth when traveling long distances.

MARTIN: What do penguins, sea turtles and whales have in common ... only about 30 centimeters long, to pygmy blue whales, around 20 meters long - we found the relative depth - so how deep are ...

Amid a torrent of alarming headlines calling out rising sea temperatures, melting ice sheets and struggling coral reefs, new ...

blue whale, fin whale or leatherback sea turtle in a state-managed fishery violates the federal Endangered Species Act. The Center for Biological Diversity is a national, nonprofit conservation ...

Mr Marshall said the sea creature may have been more than 25m (82ft) in length and weighed more than 100 tonnes (100,000kg). Yet despite their size, blue whales are "largely 'invisible' even to ...

Entanglement in fishing gear is a leading threat to endangered whales and sea turtles. Trap fisheries, like California’s commercial Dungeness crab and New England lobster fisheries, are threatening ...