The fivebeard rockling (Ciliata mustela) is a coastal ray-finned fish of the family Lotidae.

[2] The fivebeard rockling is found in the eastern Atlantic from Finnmark to Lisbon, including the Skagerrak, the Kattegat, Iceland and around Great Britain and Ireland.

[4] These fish can display homing behaviour and are normally found no deeper than the lower limit for the growth of green algae, around 20 metres (66 ft).

Spawning takes place in the deeper waters of the Atlantic to the west of Ireland during February to May.

[1] The fivebeard rockling is regarded as being of least concern by the IUCN and is not a commercially important species, in the warmer waters in which it occurs it may be threatened by climate change.