Grubby is a Maxis-made cell featured in the second level of the Cell Stage. It has two whisker-like Filter Mouths and no relatives, being hunted by all carnivore cells of the level. They normally come alone or in small groups of 2-4, but can gather into large groups, normally near the Large Green Plant Flakes or other areas rich with food. Large groups of grubby can be very annoying or very helpful, depending on if you are a carnivore or a herbivore.
In colour and multiplicity of eyes, but not in texture and diet, Grubby somewhat resembles the omnivorous Nosey and Bloato. However, it really resembles Squiggly, another herbivore that appears later. Both are green multiple flagella bearing herbivores with multiple eyes. Grubby may be an ancestor to Squiggly.
Grubby makes a high pitched "waaaaaaaa" when hit and runs away making bubbly "pdew" sounds. However, when Grubby is prey sized it runs away with a very high pitched version of what sound it makes when it runs away as a peer sized cell. They make the same sounds as Jetster.