Blue, jellyfish-like creatures called velella velella are washing ashore California beaches. Here's what to know.

Mermaids have enchanted people for centuries, but the older legends behind them are far darker than their modern image suggests. In mythology and folklore, these mysterious beings of the deep were ...

Add Yahoo as a preferred source to see more of our stories on Google. Far below the ocean’s surface, where sunlight can’t reach, some of the most unusual creatures on Earth thrive in complete darkness ...

A mama sea creature was seen with her baby in California waters, onlookers said. Akira Hojo Unsplash A “beautiful” mama sea creature was spotted alongside her baby off the coast of California. On Feb.

Thousands of meters below the ocean's surface lurk some gigantic creatures, much larger than their shallow-water brethren. Scientists have a few hunches for why this happens, but the debate continues.