1. They have the densest fur of any mammal. Sea otters have an incredibly dense fur coat that helps them stay warm in the frigid waters they inhabit. Their fur consists of two layers: a thick underfur that traps air and an outer layer of longer guard hairs that repel water. This dense fur acts as an insulating layer, allowing them to maintain their body temperature even in freezing waters.
2. They are expert divers and swimmers. Sea otters are remarkably adapted for life in the water. They have streamlined bodies, powerful webbed feet, and strong tails that help them swim efficiently. They are capable of diving to depths of up to 330 feet (100 meters) and can hold their breath for several minutes while searching for food.
3. Sea otters use tools to forage for food. Sea otters are known for their use of tools while foraging for food. They typically lie on their backs and use rocks or pieces of kelp as tools to break open shellfish or pry open sea urchins. This behavior demonstrates their intelligence and problem-solving skills.