Fin's Fish Guide
The Marbled spinefoot (Siganus rivulatus) is a saltwater fish of the family Siganidae that grows up to 30 cm.
Originally the Red Sea and the western Indian Ocean, on shallow reef and seagrass bottoms.
Description
The marbled spinefoot is an algae-eating reef fish of the family Siganidae reaching about 30 cm. The oval, greenish mottled body with a silvery sheen has a small, blunt mouth recalling a rabbit, and bears venomous spines in the dorsal, pelvic and anal fins. The species is native to the Red Sea and the Indian Ocean but has entered the eastern Mediterranean through the Suez Canal, where as a Lessepsian migrant it grazes algae and seagrass in large schools and has become locally numerous. It is an important commercial fish in the eastern Mediterranean, but its grazing can damage native algal beds. Take care when handling: the spines are venomous.
Frequently asked questions
How do you recognise the Marbled spinefoot?
The Marbled spinefoot has a torpedo-shaped body, is mainly green and shows a marbled pattern. Algae-eating reef fish with a small, rabbit-like mouth and venomous spines in the dorsal, pelvic and anal fins; a Lessepsian migrant in the Mediterranean Sea.
Where does the Marbled spinefoot live?
The Marbled spinefoot lives in the sea (marine waters) and is mostly found around stony or rocky ground. Originally the Red Sea and the western Indian Ocean, on shallow reef and seagrass bottoms.
How big does the Marbled spinefoot get?
The Marbled spinefoot grows to a maximum of about 30 cm. On average the species is around 20 cm.
Is the Marbled spinefoot dangerous to humans?
The Marbled spinefoot is venomous — handle spines with care and seek medical help after a sting if needed. The spines in the dorsal, pelvic and anal fins are venomous and give a painful wound. Immerse the stung part in water as hot as can be tolerated (about 40-45 °C) to break down the venom and seek medical help if symptoms are severe.
Is the Marbled spinefoot edible?
Yes, the Marbled spinefoot is commonly eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Siganus
More from the family Siganidae
Want the complete picture on the Marbled spinefoot?
Point your camera at the fish and Fin names the species in seconds. Free, and the Marbled spinefoot is one of 12,519 species in the app.