* Arcos erythrops (Jordan & Gilbert, 1882) .

Rockwall Clingfish. To 5.4 cm (2.1 in) SL (Personal communication: Scripps Institution of Oceanography Fish Collection, La Jolla, California). Cabo San Lucas, southern Baja California and Gulf of California (De La Cruz-Agüero et al. 1997) to southern Mexico (Robertson and Allen 2002). Benthic; depth: intertidal to 15 m (49 ft) (min.: Robertson and Allen 2002; max.: Personal communication: Scripps Institution of Oceanography Fish Collection, La Jolla, California).