Most of the corals are from the Pripyat and Dauphin County series which aren't seen much in the US. The clown is a Fukushima morph though it's looking a little dull in this picture.
OK, here's the non-April 1st version of the same shot.
This version has only had the white balance corrected. I prefer to take my tank pictures in the daytime so that the corals are open and fish are active but constantly have problems with window reflections and back reflection from the front glass. Is there a way to reduce reflections other than hanging blackout curtains? Using a flash or turning on all possible light seems to help but that has it's own problems (white spots).