* Dialommus macrocephalus (Günther, 1861). Foureye Rockskipper. To 11 cm (4.3 in) TL (Allen and Robertson 1994). Cabo San Lucas, southern Baja California to Colombia (Thomson et al. 2000). Benthic; depth: intertidal to 5 m (15 ft) (min.: Thomson et al. 2000; max.: Personal communication: Scripps Institution of Oceanography Fish Collection, La Jolla, California).