crazy man... no crits or comments?
maybe you should post one at a time, 3 at a time is too much to take in at once.
the huge green dude his mouth seems um-possible! the spikes comin out of his cheeks would make more sense if the spikes came out of his mouth. his mouth would not be able to open wide enough to get past his teeth? nice concept.
my favorite is the seagoat. the creature itself seems believable, i'm not too sure about the paint job though.
the last one is a great start, the addition of details compared to your last pieces make a big difference!
you should check out Scotty's work, he's posting all the time, look at his C&C's you could learn a lot from them~