Resident fish include the threespine stickleback and prickly sculpin in addition to the tidewater goby.
en.wikipedia.org They are not very particular and eat spiny fish like perch, and will even take sticklebacks if they are the only available prey.
en.wikipedia.org Whereas sticklebacks use this secretion to bind plant matter together to create a nest, the tube-snout simply attaches its eggs to a substrate.
en.wikipedia.org As adults, they are primarily piscivores, preying on lamprey, whitefish, grayling, young northern pike, suckers, stickleback, trout, and perch.
en.wikipedia.org