See text Eulophiidae, the spinous eelpouts, is a small family of marine ray-finned fishes classified within the suborder Zoarcoidei of the order Scorpaeniformes.

Kwun and Kim argued that the molecular phylogenetics showed that Eulophias was only distantly related to the species classified within the Stichaeidae.

[7] The genera Eulophias and Azygopterus were subsequently placed in the subfamily Neozarchinae in the tribe Eulophini prior to Kwun and Kim's analysis.

[10] Eulophiidae fishes are characterised by having an almost completely spiny dorsal fin,[4] the pectoral fins may be absent or have at most 7 rays, there are no teeth on the vomerine or on the palatine teeth, they have 6 branchiostegal rays, there is no pyloric caeca, they have between 26 and 45 vertebrae in front of the tail and the parietals do not meet at the midline of the skull.

[8] Eulophidae fishes are found in the North Western Pacific Ocean off Japan, Korea and the Russian Far East.