What is "wormfish"

n. Any of the family ''(taxlink Microdesmidae family noshow=1)'' of small goby-like fish which often burrow in estuarine mud.

Wormfishes are a subfamily, Microdesminae, of goby-like fishes in family Microdesmidae of the order Perciformes.

They are found in shallow tropical waters, both marine and brackish, often burrowing in estuarine mud. They are small fishes, the largest species reaching only about 12 cm in length.