Some of the world’s most fascinating creatures live underwater. And unlike the more mainstream animals under the sea — ...

The sea creature is bright blue and can swell up like ... and is native to the Western Pacific. These jellyfish are clear or brown-tinted and are usually the size of a beach ball.

Sea creatures were spotted in California waters ... company saw the “perfect combination” of Risso’s dolphins and clear water, according to a Facebook post by the group.

Sea slugs use bold, bright colors under sunlight to warn predators of their toxic traits. These colors are easier for fish to ...

Though once thought to be siphonophores — colonies of specialized zooids — the velella velella is now classified as a single ...

“Scientists once believed that only animals who were vocal learners — like humans and parrots — could learn to find a beat,” ...