7) Mugil incilis Hancock, 1830;

Mugilidae .

Parassi Mullet, Trench Mullet; Liseta, Lisa Rayada (Fig. 3A).

Diagnosis: This species differs from other congeneric species of the family occurring in the freshwaters of the country (Atlantic) by the following combination of characters: pectoral fin length 77.0–80.0% of HL (vs. 66.0– 74.0% of HL in Mugil cephalus Linnaeus, 1758); vertical scale rows on sides 42–45 (vs. 38–42 in M. cephalus and 36–39 in Mugil curema Valenciennes, 1836); anal fin rays 9 (vs. 8 in M. cephalus); and sides of the body without lines or stripes (vs. 6–10 brownish stripes on the sides in M. cephalus).

Basis of the record: Twelve specimens were captured in the Tortuguero and Parismina River basins. Eleven specimens were captured in Barra del Colorado, in a lagoon near the mouth of the river, Pococí, Limón (10.77500, -83.58879), at 0 m.a.s.l., on January 9, 1967, by William Bussing et al. (UCR 1067-010). An additional specimen was captured in the río Pacuare, near the mouth of the river, Siquirres, Limón (10.219424, -83.284898), at 8 m. a.s.l., on July 22, 2004, by Jorge Picado (UCR 2835- 005).

Remarks: This species inhabits estuarine areas and coastal environs; it could be considered as an opportunistic visitor of freshwater ecosystems (Robertson & Van Tassell 2019).