Blue-lined goatfish


Blue-lined goatfish

Taxobox
name = Blue-lined goatfish


image_caption = Photo by Ian Skipworth
regnum = Animalia
phylum = Chordata
classis = Actinopterygii
ordo = Perciformes
familia = Mullidae
genus = "Upeneichthys"
species = "U. lineatus"
binomial = "Upeneichthys lineatus"
binomial_authority = (Bloch & Schneider, 1801)
The blue-lined goatfish or red mullet, "Upeneichthys lineatus", is a goatfish of the family Mullidae, found off eastern Australia and around New Zealand at depths of between 5 and 100 m. Its length is up to 30 cm.

The blue-lined goatfish is an elongate, benthic fish with a steeply sloping forehead ending in a downward facing mouth and a pair of conspicuous long barbels under the chin. These barbels are used to dig in bottom crevices or sediments to disturb invertebrates or small fish that are quickly snapped up. There are two dorsal fins, the first high and triangular and the second longer and more rounded.

In early summer large males set up temporary spawning territories and have elaborate border displays and disputes to keep other males out. Young blue-lined goatfish appear in late summer growing to about 15 cm by the end of their first year.

Colouration of this species is very variable. Small individuals are pale pink-brown above, white below, and have a line of dark brown squarish splotches along each flank. The fins are yellowish often tinged with blue. Larger specimens have this same colour pattern when feeding or swimming but are differently coloured when resting on the bottom. At these times the entire body and fins are suffused with bright red, there is a pale blue spot on each body scale, and blue markings on the head and fins. The line of brown markings on the flanks becomes a dark red-brown. Courting males are similarly coloured but are blue tinged pink rather than red and have bright blue markings on the fins. At night, or when removed from the water, blue-lined goatfish are bright orange-red splotched with white.

Blue-lined goatfish are a common inhabitant of coastal areas and although small are delicious eating.

References

*
* Tony Ayling & Geoffrey Cox, "Collins Guide to the Sea Fishes of New Zealand", (William Collins Publishers Ltd, Auckland, New Zealand 1982) ISBN 0-00-216987-8


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