Grubby is a Maxis-made cell featured in the second level of the Cell Stage. It has two whisker-like Filter Mouths. They normally come alone or in small groups of 2-4, but can gather into large groups, normally near large plants or other areas rich with food. Large groups of grubbies can be very annoying or very helpful, depending on if you are a carnivore or herbivore.
Unlike most of the NPC cells, none of its parts are hidden.
It is one of only two encounterable cells with multiple mouths, the other being megamouth.
Grubby makes a high pitched "waaaaaa" sound when hit and runs away making bubbly "pdew" sounds. When prey sized, it runs away with a higher pitched version of what sound it makes as a peer sized cell. They make the same sounds as jetster.