
Source: Wikimedia Commons
Scatophagus argus
A brackish fish with a squarish, strongly compressed body covered in round brown blotches, found through mangroves and estuaries of the Indo-Pacific. It eats plenty of plant matter and comes in green and red morphs. The dorsal spines are venomous.
Scatophagus argus is a scatophagid ranging from the Persian Gulf along the south Asian coast into the western Pacific, north to Japan and south to New South Wales. FishBase records 45cm total length with 20cm as a common size, while other accounts give a maximum of 38cm. The squarish, strongly compressed body is covered in round brown blotches; juveniles are greenish brown with five or six dark bars. It lives in shallow coastal habitats such as estuaries, mangroves, harbours and the lower courses of rivers. Two colour morphs exist, the green scat and the red or ruby scat. LiveAquaria gives 22-28C, pH 7.5-8.5, 8-12dKH and a 473 litre minimum. It is an omnivore with a strong vegetable requirement, so algae-based foods must be part of the diet. The dorsal spines are venomous, and FishBase lists the species as venomous.
Source: Wikipedia (CC BY-SA 4.0)
The Spotted Scat lives 5-8 years.
The Spotted Scat grows to 20-38cm.
The ideal temperature for the Spotted Scat is 22〜28℃.
Origin
Indo-Pacific (Persian Gulf to Japan and southeastern Australia)
Lifespan
5-8 years
Sources: FishBase / LiveAquaria
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Sources: CITES Appendices (species not listed) / IUCN Red List
Regulations may change. Always verify the latest information with the relevant authorities.
Find listings for this species
Size
20-38cm
Temperature
22〜28℃
Prepared foods with vegetable content, marine algae, frozen foods
LiveAquaria gives a 473 litre (125 gallon) minimum. The fish is deep-bodied and grows quickly, so choose a tank with both height and length.
LiveAquaria gives 22-28C (72-82F), pH 7.5-8.5 and 8-12dKH; FishBase records 20-28C in the wild. It adapts from brackish to marine conditions, but salinity should be kept stable.
LiveAquaria rates it semi-aggressive. Pair it with robust brackish fishes of similar size; its strong appetite means slower feeders lose out.
An omnivore with a strong herbivorous component. Base the diet on algae and vegetable-based prepared foods with frozen items alongside. It strips aquatic plants, so it does not suit planted tanks.
FishBase lists it as a commercially farmed species, but home-aquarium spawning is rarely recorded.
The dorsal spines are venomous and both FishBase and LiveAquaria record the species as venomous. Take care not to be stung when netting it or working in the tank.
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Spotted Scat is 22〜28℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Spotted Scat is 5-8 years. With proper care and nutrition, they can live a long and healthy life.
Spotted Scat typically reaches 20-38cm as an adult. Size may vary depending on care conditions and individual genetics.
Spotted Scat feeds on: Prepared foods with vegetable content, marine algae, frozen foods. Aim for a balanced diet with appropriate feeding frequency.
The price of Spotted Scat varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 17, 2026