The carpet eel-blenny (''Congrogadus subducens''), also known as the green wolf eel or green wolf eel blenny, is a relatively large species of

dottyback The dottybacks are a family, Pseudochromidae, of fishes which were formerly classified in the order Perciformes, but this has been revised and the family is regarded as of uncertain affinities, or ''incertae sedis'' within the Ovalentaria, a cl ...

found in coastal parts of the

Indo-West Pacific The Indo-Pacific is a vast biogeographic region of Earth. In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the ...

, including

coral reef A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups. C ...

s, among rocks,

seagrass Seagrasses are the only flowering plants which grow in marine environments. There are about 60 species of fully marine seagrasses which belong to four families (Posidoniaceae, Zosteraceae, Hydrocharitaceae and Cymodoceaceae), all in the or ...

beds,

tidal flat Mudflats or mud flats, also known as tidal flats or, in Ireland, slob or slobs, are coastal wetlands that form in intertidal areas where sediments have been deposited by tides or rivers. A global analysis published in 2019 suggested that tidal fl ...

s and in

brackish Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estu ...

habitats.Goemans, B. (November 2008)
Dottybacks—Choose Carefully!
TFH Magazine. Retrieved 12 November 2016. Despite the common names, it is unrelated to the true wolf eel of the North Pacific, the true eel of the order

Anguilliformes Eels are ray-finned fish belonging to the order Anguilliformes (), which consists of eight suborders, 19 families, 111 genera, and about 800 species. Eels undergo considerable development from the early larval stage to the eventual adult stag ...

and the true blennies of the suborder Blennioidei. It is the largest dottyback, reaching up to in length. The colour is very variable (green, brown, black or bluish; often with spots or blotches) and the carpet eel-blenny can change it to match the surroundings. The carpet eel-blenny occasionally makes its way into the

marine aquarium A marine aquarium is an aquarium that keeps marine plants and animals in a contained environment. Marine aquaria are further subdivided by hobbyists into fish only (FO), fish only with live rock (FOWLR), and reef aquaria. Fish only tanks ofte ...

trade, but it is predatory and will eat

crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can ...

s and smaller fish.Reefkeeping (April 2004)
What the Heck is That? The Genus Congrogadus.
Retrieved 12 November 2016.

References

Congrogadinae Fish described in 1843 {{ray-finned fish-stub