Mutualism

A humpback whale breaching.

Bacteria on Whale Skin Tell a Tale of Health and Sickness

A humpback whale breaching. Credit: Wanetta Ayers Whales swimming in the ocean are never really alone. Even if one swims by itself with no other whales for miles around, it still has company—the tiny...
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A Brittle Star May Be a Coral’s Best Friend

A brittle star wraps its arms around the branches of a deep sea octocoral. The coral's polyps are all open and extended, a sign that the coral is unbothered by the sea star. Credit:...