Here's how sea otters stay warm without blubber or a large body
Sea otter - Wikipedia
Otter fur coat hi-res stock photography and images - Alamy
12 Facts About Otters for Sea Otter Awareness Week | U.S. Department of the Interior
Sea Otter - Animal profile, pictures, facts, range map
Sea otters have the densest fur of any animal. Their fur contains as many as one million hair follicles per square inch. Unlike most other marine mammals, otters lack a blubber layer.
Sea Otter Fur Full-Length Coat | Voyij.com
Alaska Made: Sea otter pelts are highly prized, tightly regulated
Sea Otters coats have up to one million hairs per square inch making them waterproof to help protect their bodies against frigid waters since they lack any insulating fat. : r/Awwducational
Southern Sea Otter | Sea Otter Habitat | Aquarium of the Pacific