Also in every stage, this ship has a tendency to kidnap your ST symbol. This is often beneficial as you can win it back and have two ST's onscreen at once, side by side.
This is the first of the rare enemies. It shows up after stage 5.
This one shows up a bit later.
These faster things replace the crayfish once you get to the crazy-fast levels.
The dragonfly appears in a Challenge stage.
I don't know wha' this is supposed to be, but it too shows up in a Challenge level.
Yeah, whatever. This one took forever to get to. I didn't expect to find any new ships, and suddenly this blatent joke appeared onscreen. I think I'll just leave it as it is.