Cobralien

Cobralien is the first non-Starred-Alien enemy introduced and is introduced in Mars.

Strategy
It's a peon, and it's dizzy ability is a big deal unless you have important close-range attackers. To deal with this, just bring some anti-alien units.

Description
When the invaders realized that humans found snakes scary, they made them scarier. There's just one issue though. Don't make them fight near water, they get scared.