Sea otters are known for being one of the most beloved mammals in the world. Not only are they playful and clever, but they also have interesting behaviors that help them stay safe. For starters, sea otters are ＿＿（36）＿＿ to hold hands while they are sleeping to keep them from floating away. Also, sea otters are often seen ＿＿（37）＿＿ their adorable faces or other parts of their body for a matter of life or death. That is, because they do not have the fat other sea animals have, they must groom a lot to ＿＿（38）＿＿ getting water into the skin. If they do not do so, they might be at risk of losing too much ＿＿（39）＿＿ and freezing to death, especially for the sea otters that live in cold-water places. Besides staying well-groomed themselves, mothers spend a lot of time helping their young pups groom by licking them since younger sea otters do not know how to do it by themselves. These actions may just appear cute to humans, but are ＿＿（40）＿＿ to their survival in the wild.