A chambered nautilus drifting along a deep reef slope carries one of the most distinctive buoyancy systems in the ocean. Nautilus buoyancy control depends partly on the animal’s coiled external …
Beneath Antarctic sea ice, seawater hovers close to its freezing point. Light filters through cracks in the ice, illuminating a world of sponges, crustaceans, and fishes whose bodies have been …
A newly hatched loggerhead sea turtle reaches the edge of the beach and enters an ocean that, from its perspective, contains no road signs, trail markers, or familiar landmarks. Soon, …
Introduction To most people, a coral reef looks like an underwater rock garden filled with colorful formations, fish, and sea turtles. During the day, the hard coral structures appear still …