Gobiomorus dormitor Lacepède, 1800 .

Bigmouth Sleeper; Guavina del Atlántico, Bocón, Guavina Bocóna, Guavina de Ley.

Distribution: Global: Western Atlantic Ocean; from Bermuda and southern Florida, USA, to southeastern Brazil; entering estuaries and littoral lagoons and ascending river courses; Costa Rica: LN, RF, SJ, SC, Sa, To, Pa, Ma and Si (Atlantic), 0– 60 m.a.s.l., Per, Dia.

Occurrence and conservation status: Nat, LC.

References: Bussing (1966: 237; listed, information on distribution), Bussing (1987: 249; 1998: 420; brief description, including illustrations and an identification key, information on distribution, with a map, and ecology), Angulo et al. (2013: 1006; listed, including taxonomic information and distributional data) and Robertson & Van Tassell (2019: 4100; detailed description, including illustrations, information on distribution, with a map, and ecology).