How about a nice normal-looking goldfish (I'm sure this must have already been suggested), like a Comet: sleek and streamlined with relective scales, that would perhaps move a bit more quickly and provide a contrast to the three lovelies that are already there. Oreo, Ginger, and Algernon are beautiful and seem somehow Baroque to me. Now how about a touch of Moderne. But perhaps the general concensus is, "If it ain't baroque, don't fish it."
(Sorry, I can hear your groans, but I couldn't resist).
