Rhycherinae

Rhycherinae, the Balrog frogfishes, is a subfamily of frogfish found in the Indo-Pacific region. Members of this subfamily were previously placed in the subfamily Histiophryninae (formerly treated as the family Histiophrynidae), but a 2022 phylogenetic study found them to form a distinct clade, which was described as the family Rhycheridae. A 2025 phylogenetic study found Antennariidae to be oversplit into multiple families, and thus reclassified the Rhycheridae as the subfamily Rhycherinae. Eschmeyer's Catalog of Fishes presently recognizes the clade as a subfamily.

The common name "Balrog frogfishes" references the red coloration seen on many members of the species, which, when combined with their frequently open mouths, is remiscent of the Balrog of J. R. R. Tolkien's works.