This deep-sea shark wants to make sure it doesn’t miss out on anything that could possibly be a meal. Pacific sleeper sharks live in cold, deep waters where food is scarce. This one is a 3.5 meter long female, but its thought that adults in even deeper waters could be much larger. Pacific sleeper sharks are also closely related to the famous Greenland sharks, who have the longest lifespan of any known vertebrate. These species are so similar that they can actually interbreed, and they are both c