Hyporhamphus roberti (Valenciennes 1846) . Slender halfbeak; Pez aguja, Agujeta larga

Vouchers: Not available. Distribution: Western Atlantic Ocean; from the southwestern Gulf of Mexico to southern Brazil; entering estuaries and littoral lagoons and ascending river courses; (Nicaragua) Es (Atlantic); 0–4 masl; Per, Dia, Amp. Occurrence and conservation status: Nat; LC (2019), population trend unknown. Literature: González-Alemán (2006: 77; brief description, including an illustration, and information on distribution and ecology), Robertson & Van Tassell (2019: 3326; detailed description, including illustrations, and information on distribution, with a map, and ecology) and Angulo (2021: 58; listed, including information on distribution).