Freshwater clingfishes are small benthic fish inhabiting temperate and tropical waters, typically in areas with relatively high water velocity.
We collected the clingfishes described here along with multispotted goby (Sicydium multipunctatum) (sites 1-3), leopard splitfin (Xenotaenia resolanae) (sites 1-2), golden livebearer (Poeciliopsis baenschi) (sites 2-3), blackspotted livebearer (Poeciliopsis turneri) (site 2), mountain mullet (Agonostomus monticola) (site 3), and spotted sleeper (Eleotris picta) (site 3).
In addition to potential species overlap, our study indicates there is need for a revision of the Mexican freshwater clingfishes.
8 mm SL, the specimen captured in site 2 is not only the largest ever reported specimen for the species or freshwater Mexican clingfishes, but also one of the largest freshwater gobiesocids reported worldwide.
A review of the clingfishes (Gobiesocidae) of the Eastern Pacific with descriptions of new species.