Board Thread:General Discussion/@comment-6141704-20161031023246/@comment-3412412-20161204010956

Same species, same alien. Hence, Water Hazard is Overflow.

Those underwater agility/speed, flight and water manipulation abilities that Water Hazard "lacked" simply wasn't properly shown.

If we are renaming aliens, I'll rename the other 9 below:
 * Diamondhead = Crystalman
 * XLR8       = Speed
 * Cannonbolt = BouncyBall
 * Wildvine   = Plantman
 * Upgrade    = Technogoo
 * Stinkfly   = Poopeater
 * Fourarms   = Armman
 * Heatblast  = Fireman
 * Grey Matter = SmartFrog

I think those names are improvements.