Fishes from the Tirimbina Biological Reserve, La Virgen de Sarapiquí, Heredia, Costa Rica Author Angulo, Arturo Author Naranjo-Elizondo, Beatriz Author Rojas, Emmanuel Author Ley-López, Juan Manuel text Check List 2017 2017-10-27 13 5 683 702 http://dx.doi.org/10.15560/13.5.683 journal article 10.15560/13.5.683 1809-127X (8) Rhamdia nicaraguensis ( Günther 1864: 125 ) ; Catfish (En), Barbudo (Sp) Figure 3C Body very elongate; 3 pairs of barbels, maxillary barbels usually extending beyond the dorsal fin origin up to the pelvic fin insertion; scales absent; fins with strong spines; serrations present only on the inner (posterior) margin of the pectoral fin spine, or absent; a single dorsal fin; adipose fin present, its base larger than the base of the dorsal fin and occupying about 75% or more of the distance between the dorsal fin insertion and the origin of the caudal fin; caudal fin forked; general coloration brownish gray, darker dorsally, usually dark gray to tan, and paler, usually yellowish white or almost white, ventrally; the dorsal and caudal fins are dusky and the paired and anal fins are almost gray, transparent or white lightly pigmented; maximum body length ca 260 mm SL.