Rainbow dolphin have got a long trip through the space yet. Colors were taken from Erstus' 13-color palette.
looks nice :)
Sorry for being unclear - here's a (really quick) edit to show what I mean (on the top).
It seems like I misunderstanding you.
I think the "particle" effect of the "dithering" would be enhanced a lot if you had the dolphin sort of fade away into space.
Fun piece! =D Good job!