Personally I feel that they are a tad noisy with too much pink, for instance I can't easily descern the two medium ships in the center between each other.
it looks cool an all but other than their sizes there's not a lot to differentiate from each of them.
I understand you're going for a 'fleet' theme so they have to fit each others style, but the big ones are harder to look at for me..
perhaps adding a difinitive coloured thing attached to the ship or some sort of addition like a turret on one or something may help this..
Other than this they all look great, i especially like the one on the left that kinda makes me think of a scorpion without a tail.. the small ones look like fast and light flyers. and the tiny ones are cute =) I also enjoy the organic look they have to them, the small ones respresent this style the best, I think.
Yeah, this is plain 24bit. The huge amount of similar colors mean that this cannot possibly have been painted with pixel-by-pixel (and thus color) control required by the pixelart definition, sorry. Funky spaceships though :)
The design of these ships is very cool. They look like a good mix of organic and artificial.
238 colors is way too many though, since it looks nearly the exact same with 30-40 colors.
Looks like a lot of copy & paste, they look like those blurry splashes of ink used in psycology tests