These flower-like anemones are no shrinking violets—they’re deadly predators. Without the ability to see or swim, they rely on their poisonous tentacles to snare prey. (Don’t worry, clownfish have a special adaptation—a thick layer of mucus—that protects them from the anemone’s poison).
And, as it happens, venoms from various anemone species are currently being studied for potential uses to treat cancer (Entacmaea quadricolor), obesity, and multiple sclerosis (Stichodactyla helianthus).
See these colorful creatures in The Power of Poison.