this is a fish that breathes air so there is no problem being out of the water. don't have a mucous layer you take off. this is very, very tough fish. has got this underneath, this sucker mouth and that's how it feeds. and that's how it breathes air. jon: people are used to seeing them cleaning algae off aquarium, aquarium walls and bottoms, right? >> that is exactly what they're used for. they eat algae. they eat organic material on bottom of lakes or pond or in your aquarium. that's why people have them here in this country. jon: so they're great for cleaning an aquarium but not so great when they wind up in a florida pond. tell us why. >> well, the, the big issue in terms of the impacts of this species is really an economic issue. they bureau nests. the males do into the banks of ponds or canals. they make that bureau.