Graceful sea turtles, curious hammerhead sharks, and gliding stingrays round out this list of ocean ambassadors, each showing that not everything beneath the waves is to be feared.

Something small, shiny and electric blue is catching beachgoers' eyes along the Texas Gulf Coast. Commonly known as a blue button (and scientifically known as Porpita porpita), these striking, ...

This makes it one of the very few animals capable of photosynthesis. Living in shallow waters near Japan, Indonesia, and the Philippines, this animal-plant hybrid thrives in sunny, algae-rich ...