A biologist says he believes a mysterious creature spotted in Alaska's Lake Iliamna may in fact be nothing more spectacular than a large sleeper shark. Writing in the Alaska Dispatch, biologist Bruce Wright says he thinks the same kind of shark may be behind Scotland's famous Loch Ness Monster as well. Pacific sleeper sharks, also known as Greenland sharks, are commonly seen in the waters around Alaska and have been known to grow up to 14 feet in length. If a sleeper shark has managed to survive in Lake Iliamna, Wright says it would have an abundance of fish to feed on and no natural predators. "Certainly the size and the shape and the color seems to match a lot of the descriptions," Wright told AOL. However, he also acknowledges that sleeper sharks do not commonly rise to the surface of bodies of water. And most important, it is not known if a sleeper shark could survive for extended periods of time in fresh water, like the bull shark. Read more: http://news.yahoo.com/blogs/sidesho...y-sleeper-shark-biologist-says-233211614.html