Researchers witness strange sea animals, including poisonous sea pigs and hand-sized sea spiders, while sailing to the Denman ...

Also known as the red devil, the Humboldt squid is a powerful animal, and not even a suit of chainmail can withstand its raw ...

They found that sea slugs use bold visual signals like brightly colored spots, thick stripes, or enhanced body outlines to ...

Hordes of highly venomous sea creatures are washing up on Texas beaches, prompting warnings from authorities along the coast. The creature, called Portuguese man o’ war, resembles a jellyfish ...

The flamboyant fish that is one of the deadliest sea animals is the lionfish ...

Hordes of bright blue, jellyfish-like sea creatures are washing up on beaches across California. As of Monday, thousands of the critters — called velella velella or by-the-wind sailors — have been ...

Rather than hiding from predators, the brightest and most patterned sea slugs are active during the day so their colors shine ...

Some scientists claim that octopuses could be the next big species after humans go extinct and that there is much to learn ...

Dog owners should make sure that their pets don’t chomp on the dried-out jellies. The poisonous sea creatures won’t permanently damage dogs who eat them, but they can cause nasty side effects ...