Marine mammals

Marine mammals breathe air, give birth to live young and feed them with milk, even though they live in the sea or depend heavily on aquatic environments. Some spend almost their entire lives in water, while others rest or breed on shore.

Examples of marine mammals

Examples include whales, dolphins, seals, walruses, narwhals, sperm whales, sea lions and manatees. Their size, behaviour and diets differ, but all have adaptations for life in water.