Interesting thing about them I read on the NANFA (North American Native Fish Association). (Or was it a PM he sent me?) Someone was able to seine a bunch of small ones with a permit and ended up selling them for research at a very good price. Anyway, he said what was really weird was they would only face in one direction in the circular tank regardless of the direction of the flow. He thinks it has something to do with their primitive ancestry and the Coriolis Effect.