Bluestriped Goatfish

Fascinating facts about the Bluestriped Goatfish

• Divers often spot these goatfish hovering just 5 m above the sand, yet they can disappear into the deep, occasionally diving down to 100 m (328 ft) where they become far rarer below 40 m (130 ft). Their vertical range shows how adaptable they are to both shallow bays and deeper offshore shelves.
• A single adult can grow up to 40 cm (16 in) in total length, and it is commercially important.
• Each chin bears two fleshy barbels that act like underwater whiskers, probing the sediment for tiny molluscs, crustaceans and polychaete worms, an elegant solution to hunting in murky, sandy bottoms.
• The fish’s body is a moving canvas of pale cream to deep red, accented with blue and gold facial lines, thin yellow stripes, and blue dots along the flanks.
• Spawning takes place in the open water column, with eggs and larvae drifting freely after external fertilisation; this pelagic early life stage spreads the species across the temperate seas of eastern Australia, ensuring its continued presence from Fraser Island down to Tasmania.

At a glance

About the Bluestriped Goatfish

The bluestriped goatfish, Upeneichthys lineatus, is a striking marine ray-finned fish of the Mullidae family that inhabits the temperate seas along eastern and southeastern Australia. Its small, fleshy-lipped mouth is lined with a single row of conical teeth, and, like its relatives, it bears two sensitive barbels on the chin that it waves over sandy or rocky substrates to locate hidden prey. Colouration is highly variable, ranging from pale cream to deep red, but most individuals display a distinctive mid-lateral stripe flanked by thin yellow lines and blue dots, with blue and gold facial markings and yellow dorsal and anal fin stripes. Adults can grow to about 31 cm, though some reports note a maximum length of 40 cm, and their dorsal fin carries nine spines and eight soft rays while the anal fin has a single spine and six rays. In sheltered bays and harbours, often at depths between 5 and 200 metres, these fish form small schools that sift the seabed for tiny molluscs, crustaceans, echinoderms, and soft-bodied polychaete-like animals. Their fine teeth lack the crushing molars of some goatfish, reflecting a diet of delicate, soft prey. A surprising trait is their reproductive strategy: sexes are separate, fertilisation occurs externally above the bottom, and both eggs and larvae drift freely in the pelagic zone, allowing wide dispersal before the juveniles settle onto the benthic habitat where they continue their barbel-guided foraging.

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