Can the Darwin fish be improved upon?

Darwin fish cladogram by Anne Casselman, Inkling Magazine

Matthew Bettelheim at Inkling Magazine has written a brief history of the Darwin fish and its various spin-offs. I had no idea there were so many.
Update: they’ve just announced a contest to design (intelligently, natch) the next Darwin fish morph. I’d enter, but Shane McKee already has my vote. (Actually, I don’t get to vote – the judges are PZ Myers, Bobby Henderson, and Nona Williams. But fish #11 rocks).