Greengill

Fish Facts
Many strange creatures reside in NLACakaNM. Gangsters, Juvies, the Dead, the Undead, and other, stranger beasts and crawling things born of slime and the peculiarities of a mutated genome. The Greengill is none of these things. A variety of a much more common and unremarkable species of fish within the United States, the greengill is almost painfully average and normal when compared to some of Slime City's resident flora and fauna. This is because, for whatever reason, this species has gone largely unaltered by the conditions within the unusually slime- and radiation-rich environment in which it lives, retaining all of its original features, save for the ability to breathe in slime and a slightly green tinge around its gills, hence the name. If anything, that makes their condition all the more bizarre, and local academia still struggles to understand why, of all things, this species of fish has been so unaffected by the mutating influence of our unique biome. All they've been able to figure out is that the green tinge along their gills seems to be a result of staining by the slime that passes through them, leaving a residue that seeps deep into the tissues that make up their scales. Thus, a greengill's age can be determined by observing the extent of the green patch along their sides, with a larger marking indicating a longer life lived.