Notarius biffi Betancur-R. & Acero P. 2004

Notarius biffi is distinguished from other EP species of Notarius by the following combination of features: a small mouth, its width 34.2–39.3% (mean 36.2%) HL; eye large, its diameter 3.8–4.5% (mean 4.2%); short mandibulary barbels, their length 10.2–13.1% (mean 11.6%) SL; short anterior internarial distance, 17.9–20.8% (mean 19.4%) HL; relatively slender caudal peduncle, depth 6.1–6.7% (mean 6.4%) SL; and gill rakers on first arch 3–4+7–8 (mode 12). The combination of the following characters also distinguish this species from other EP ariids: triangular humeral process, three pairs of barbels present, fleshy furrow between posterior nostrils absent, fleshy groove in median depression of head absent, coarse to sharp granules or spinulations on anterior surface of head shield absent, and gill rakers on rear surfaces of first two gill arches absent (Ref 54794).

Inshore marine and brackish waters, and high salinity estuaries (Ref 54794).

Notarius biffi is a species of catfish in the family Ariidae. It was described by Ricardo Betancur-Rodríguez and Arturo Acero Pizarro in 2004. It inhabits marine and brackish waters in El Salvador, Honduras, Costa Rica, and Nicaragua, at a depth range of 9 to 30 m (30 to 98 ft). It reaches a maximum standard length of 32.4 cm (12.8 in). The IUCN redlist currently lists the species as Least Concern.

The species epithet "biffi" is derived from the nickname of Eldredge Bermingham, an ichthyologist and ornithologist affiliated with the Smithsonian Tropical Research Institute, whom the authors credit with making important contributions to the biogeography of fish in the neotropical regions.