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Scatophagus tetracanthus, commonly known as the Banded scat, is a species of perciform fish belonging to the family Scatophagidae. It is characterized by its deep, compressed body and distinctive vertical banding pattern. This species is euryhaline, capable of inhabiting a wide range of salinities from freshwater to marine environments, though it is most commonly found in brackish waters. It is a popular aquarium fish due to its striking appearance and hardiness, but its potential size and specific care requirements often lead to it being outgrown in typical home aquaria.
Physical Characteristics
- Body shape
- compressed
- Coloration
- Silvery-green to brownish-green body with 4-5 prominent dark vertical bands that extend from the dorsal fin to the belly. Fins are often dusky or yellowish. Juveniles are typically more brightly colored with more distinct bands.
- Scale type
- ctenoid
- Mouth position
- terminal
- Distinctive features
- Deep, highly compressed body, Small, protractile mouth, Prominent dark vertical bands, Spiny dorsal fin with venomous spines
- Dorsal fin
- Single dorsal fin with 11-12 strong, venomous spines followed by 16-18 soft rays. The spiny and soft-rayed portions are deeply notched.
- Tail fin
- Truncate to slightly emarginate caudal fin.
- Pectoral fin
- Small, rounded pectoral fins.
- Distinctive fins
- Pelvic fins are thoracic, with 1 spine and 5 soft rays. Anal fin has 4 strong, venomous spines followed by 13-15 soft rays.
Identification Tips
Body Shape
Look for a very deep, disc-shaped, and laterally compressed body.
Coloration and Pattern
Identify the 4-5 distinct dark vertical bands on a silvery-green to brownish-green background. These bands are a key differentiator from other scat species.
Fin Spines
Note the strong, sharp spines in both the dorsal and anal fins. These are venomous and should be handled with extreme caution.
Mouth
Observe the small, slightly protractile mouth, indicative of its omnivorous, scavenging diet.
Habitat
- Water type
- brackish
- Depth
- Typically found in shallow waters, from surface to about 20 meters (65 feet).
- Environment
- Estuaries, mangrove swamps, coastal lagoons, lower reaches of rivers, and sometimes coral reefs. Prefers areas with muddy or silty bottoms and abundant vegetation or submerged structures for shelter.
- Geographic range
- Indo-West Pacific: East coast of Africa (including Madagascar) to Papua New Guinea, north to the Philippines and south to northern Australia. Also found in the Red Sea and Persian Gulf.
Aquarium Information
- Care level: intermediate
- Temperament: semi-aggressive
- Diet: omnivore
- Minimum tank size: 120_gallons
- Temperature: 24-28°C (75-82°F)
- pH level: 7.0-8.5
- Hardness: 10-25 dGH
- Compatibility: Best kept in groups of 3-5 individuals or with other large, robust, brackish or marine fish. Can be aggressive towards smaller or more docile tank mates.
- Special requirements: Requires a large tank with ample swimming space and hiding spots. Excellent filtration is crucial due to their messy eating habits. They are euryhaline and can adapt to freshwater, brackish, or full marine conditions, but a gradual transition is necessary. Optimal health is often achieved in brackish water with a specific gravity of 1.005-1.015.
Wild Information
- Conservation status: least concern
- Seasonality: No specific seasonal patterns for availability; present year-round in its natural range.
- Market price: Moderate for aquarium trade, low for food fish.
- Commercial importance: low
- Taste: Mild, somewhat earthy
- Texture: Firm, flaky
- Cooking methods: fried, baked, steamed
- Nutritional value: Good source of protein and omega-3 fatty acids, similar to other white fish.
Key Facts
Euryhaline Natureinteresting
Banded scats are highly adaptable to varying salinities, thriving in freshwater, brackish, and marine environments, a rare trait among fish.
Venomous Spinesbehavior
Their dorsal and anal fin spines contain venom that can cause painful stings, a defense mechanism against predators.
Scavenging Dietbehavior
The genus name 'Scatophagus' literally means 'faeces eater', reflecting their opportunistic and scavenging feeding habits, consuming detritus, algae, and small invertebrates.
Aquarium Longevityinteresting
With proper care, Banded scats can live for over 10 years in captivity, making them a long-term commitment for aquarists.
Safety Information
Venomous- Safety level: venomous
- Venomous: Yes
- Edibility: edible
- Handling notes: The dorsal and anal fin spines of Scatophagus tetracanthus are venomous. Punctures can cause intense pain, swelling, and inflammation. Handle with extreme care, using thick gloves or a net to avoid direct contact with the spines. If stung, immerse the affected area in hot water (as hot as can be tolerated without scalding) to denature the protein-based venom, and seek medical attention if symptoms are severe or persistent.
Similar Species
Spotted scat
Scatophagus argus
S. argus has numerous dark spots covering its body, whereas S. tetracanthus has distinct vertical bands. The body shape and fin structure are similar, but the primary distinction is the pattern.
Ruby scat
Scatophagus multifasciatus
S. multifasciatus typically exhibits more numerous and often narrower vertical bands, sometimes with a reddish hue, and generally has a more elongated body profile compared to the deeper-bodied S. tetracanthus.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Perciformes
- Family
- Scatophagidae
- Genus
- Scatophagus
- Species
- Scatophagus tetracanthus
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