see text Ereuniidae Jordan & Snyder 1901 Rhamphocottidae is a family of ray-finned fishes belonging to the superfamily Cottoidea, the sculpins.

Rhamphocottidae was first proposed as a family by the American ichthyologists David Starr Jordan and Charles Henry Gilbert in 1883.

[2] This family is classified within the superfamily Cottoidea in the suborder Cottoidei in the order Scorpaeniformes in the 5th edition of Fishes of the World[2] but other authorities states that if Scorpaeniformes is excluded from Perciformes then Perciformes is recovered as paraphyletic and so classify this family within the infraorder Cottales within the suborder Cottoidei of the Perciformes.

The tail has all parts of the hypural and parhypural fused into a single complex structure.

[2] The smallest species is the grunt sculpin (Rhamphocottus richardsonii) with a maximum published total length of 8.9 cm (3.5 in)[6] while the largest is Ereunias grallator which reaches a maximum published total length of 30 cm (12 in).