Original description as Batrachus tau beta:
- Goode, George B & T.H. Bean. 1880. "Catalogue of a collection of fishes obtained in the Gulf of Mexico, by Dr. J. W. Velie, with descriptions of seven new species". Proceeding of the United States National Museum. 2(98):333-345 (ffm00499)
- Opsanus vandeuseni Fowler, 1939, with type locality at Sand Key, Florida, U.S.A. Determiner: Castro-Aguirre et al., 1999
- Opsanus brasiliensis Rotundo, Spinelli & Zavala-Camin, 2005, with type locality at Estado de São Paulo, Brazil. Determiner: Caires et al., 2007
Conservation: Opsanus beta is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (LC) least concern (2018).