i've made some alien species of my own, so here's some i guess:
1. smaller than humans (120cm), blue to teal skinned, potato-shaped but symmetrical head, small stubby black eyes, bipedal but somewhat hunched back, 4 fingers per arm
2. tripedal with one leg in front and two in back that look kinda crab-like, above avg height (230cm), long/tall head with black sparkly eyes that are sorta tear-shaped and 1/3rd the height of the head, body color ranges from white to pink but the legs are blue
3. dark yellowish orange body color in irregular camo-like splotches, about as tall as human, head is a gross combo of a walrus and ant eater, five white eyes (2 layers of eyes stacked above eachother and the 5th one above those), slug-like lower body and leaves a greenish-yellow sludge behind (i tried to make this one as gross as possible)