Deepwater Sculpin (Myoxocephalus thompsoni,
Although this fish looks like it should accompany a "Beware of Sculpin" sign, the deepwater sculpin is as harmless as a stuffed kitten. Nocturnal for most of the year and usually in the deepest and darkest reaches of lakes like Superior, it's a bottom-feeder, but not in a bad way. Although it has never hurt a fly, the deepwater sculpin closes its jaws on crustaceans and aquatic insects often. Where this happens depends on the time of year: its scale-less body shimmies farther from its deepwater home and closer to shore during its spawning season. Unfortunately, eutrophication decreases this fish's oxygen supply and prompts many-a-sculpin's demise in some nutrient-rich lakes. Fortunately, in Superior a deepwater sculpin can breathe easy.