I agree with Dr. House on the first one, I'd suggest like a crab and some fish, maybe an albatross.
#2 Is great, I wouldn't suggest any changes to it, that's just my opinion though.
#3 looks kind of bare, plus the grass doesn't really fit, I'd suggest a more lively option, the island on the other side doesn't appear to have anything growing on it at all, as if it were infertile.
Adiktuz - They are found in the UTM 2.0