New research suggests oysters may rely on hidden microbes to help build their shells and maintain chemistry as oceans grow more acidic.

Old World War II bombs resting on the Baltic Sea floor reveal a remarkable marine ecosystem teeming with life.

Hermit crabs are small crabs that carry shells on their backs, both for a home and for safety. But with shells being harder to find year after year, hermit crabs have had to spend more time in shells ...