These "total monsters of fishes" are extinct today, though new clues about their lives come from CT scans and their closest ...

Learn all about the unmistakable pilot whale, from their diet and size to life in the pod and why, sadly, they're prone to ...

Rare footage of a bigfin squid captured by a ROV deployed 11,000 feet deep in the Tonga Trench. Credit: Deep Sea Research ...

Find out exactly how big the biggest whale on Earth is and why blue whales can grow so huge when they only eat tiny creatures ...

Long before whales dominated the oceans, Earth’s seas were home to a fish so massive it continues to challenge our ...

Sperm whales are named after the waxy substance found in their large heads called spermaceti. The spermaceti is an oil sac ...