Neritina usnea (Roding, 1798) Olive Nerite
Distribution: Florida to Texas; West Indies. Size: 12 mm
Description: Color brownish-green to brownish-yellow with numerous striations of black, purple, or brown with a dark, almost black, band at the suture; shape globose with a large body whorl; sculpture smooth, glossy, typically with spire eroded away; aperture half-moon shaped; parietal area yellowish with a number of variable-sized small teeth; operculum black to dark brown. Habitat: Common in brackish water in muddy, sandy substrates. Remarks: Entire Texas coast. See Andrews (1977). Synonyms: Nerita usnea Roding, 1798; Neritina reclivata (Say, 1822).