The Gus is one of the aliens that can be found within the Insaniquarium Universe.
Gus are, according to the game, "baby-faced man children", and holds a slight resemblance to the Sylvester and Balrog, though isn't related to either. They resemble humanoids vaguely, and have a manatee tail.
The Gus is a highly gluttonous creature, and able to consume numerous amount of food sources, from fish to star potions. However, this gluttonous desire to feed has been known to die from excessive consumption, some to the point of exploding.