Explaining The Ocean on Instagram: "Sea otters are among the most skilled marine mammals in shallow coastal waters. 🦦 With streamlined bodies, webbed hind feet like flippers, and the densest fur of any animal on Earth, they’re perfectly built for life at sea. Their fur doesn’t just insulate—it also helps them float while they rest or forage. Otters can dive over 200 feet deep and hold their breath for several minutes. But what truly sets them apart is their ability to use tools. Unlike most mar