Goldspotted spinefoot
A venomous rabbitfish with golden spots from the Indo-West Pacific.
The goldspotted spinefoot (Siganus punctatus) is a species of marine ray-finned fish, a rabbitfish belonging to the family Siganidae. It occurs in the Indo-West Pacific region and is notable for its venomous fin spines and distinctive golden spots.
Quick Facts
- Taxon
- Siganus punctatus
Facts from the source article.
Lore & Background
Siganus punctatus was first formally described in 1801 as Amphacanthus punctatus by Johann Gottlob Theaenus Schneider and Johann Reinhold Forster, with the type locality given as Nomuka Island in the Ha'apai Group of Tonga. The specific name punctatus means 'spotted', a reference to the golden spots on the head, body and tail. The fish has a laterally compressed, deep body with a straight dorsal profile running from the forehead to the snout at a 45° angle. Juveniles under 13 cm standard length have a front nostril flap extending halfway to the rear nostril, which reduces to a low rim by 15 cm. A recumbent spine is embedded in the nape in front of the dorsal fin. The caudal fin changes from emarginate in small fish to deeply forked with broadly rounded lobe tips as the fish grows. The overall colour is greyish with a dense pattern of brown spots with darker margins over the head, body and fins; juveniles have fewer, larger spots. There is sometimes a pale saddle on the caudal peduncle and a large ocellus behind the upper margin of the gill cover, and frequently a very narrow yellow margin to the caudal fin.
Reader's Guide
The goldspotted spinefoot is a rabbitfish of the family Siganidae, found in the Indo-West Pacific region from the Cocos (Keeling) Islands to Samoa, north to Japan and south to Australia. Adults live in pairs on reefs down to 40 m depth in clear lagoons and seaward reefs, while juveniles school in estuaries. The species feeds on benthic algae. Its fin spines are robust and hold venom glands; a study of a congener found rabbitfish venom similar to that of stonefishes. It is caught by spearfishing or in fish traps and sold as fresh fish, and occasionally appears in the aquarium trade. The species attains a maximum total length of 40 cm, though 30 cm is more typical. Its specific name punctatus refers to the golden spots that cover its head, body and tail.
Did You Know?
- The goldspotted spinefoot was first described in 1801 as Amphacanthus punctatus by Schneider and Forster.
- Its fin spines contain venom glands, and rabbitfish venom has been found similar to stonefish venom.
- Juveniles school in estuaries, while adults live in pairs on reefs.
Frequently Asked Questions
What is the Goldspotted spinefoot?
The Goldspotted spinefoot (Siganus punctatus) is a species of rabbitfish in the family Siganidae, easily recognized by the scattered golden spots covering its body. It is a marine ray-finned fish native to the Indo-West Pacific region.
How big does a Goldspotted spinefoot grow?
Typically, an adult reaches about 30 cm (12 in) in total length, though the species can max out at roughly 40 cm (16 in). Its body is notably deep, measuring between 1.9 and 2.3 times its standard length.
What makes the Goldspotted spinefoot dangerous to handle?
Like other rabbitfish, it bears venomous spines along its dorsal and anal fins that can deliver a painful sting if the fish is grabbed or stepped on. The dorsal fin alone carries 13 spines backed by 10 soft rays, and the anal fin adds another 7 spines, giving it plenty of potential stingers.
Where in the ocean can you find a Goldspotted spinefoot?
Its range spans the Indo-West Pacific, encompassing coral-reef and rocky-shelf habitats across that broad tropical and subtropical zone. Divers and snorkelers in those waters are the ones most likely to spot one grazing among the reefs.
How does the Goldspotted spinefoot differ from other rabbitfish?
The combination of its distinctive golden spotting pattern and its relatively deep body shape sets it apart from many congeneric Siganus species. While most rabbitfish share the venomous-spine trait, the goldspotted spinefoot's spot arrangement is one of the quickest field marks for telling it apart in the wild.
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