Spotbanded Scat

Geographical Origin and Habitat: Native to the Western Indo-Pacific, including the coastal waters of northern Australia, New Guinea, and Indonesia. It inhabits mangrove swamps, river estuaries, and brackish coastal lagoons.

Taxonomy and Morphology: Member of the Scatophagidae family, genus Selenotoca. Features a disc-shaped, highly compressed body with robust, venomous dorsal spines. Can grow up to 40 cm in the wild, but usually reaches 20 cm in aquariums.

Social Behavior: Highly active, schooling fish that should be kept in groups of at least 4 to 6 specimens. They exhibit a lively swimming pattern and establish a minor social hierarchy, which helps reduce stress in individuals.

Coloration and Sexual Dimorphism: Body base is silvery-white or golden, covered with dark vertical bars on the dorsal region that break into round spots toward the belly. There are no reliable external differences between males and females.

Aquarium Setup: Requires a large aquarium of at least 300 liters (approx. 80 gallons) to accommodate their active swimming habits. Use heavy rocks and large driftwood for decoration. Live plants will be eaten and should be avoided.

Diet and Feeding: Omnivorous with a strong herbivorous preference. They feed on algae, detritus, and plant matter. Provide spirulina-based pellets, blanched spinach, zucchini, and supplement with frozen foods like krill, mysis, and brine shrimp.

Water Quality: Euryhaline species. While juveniles can survive in freshwater, adults must be transitioned to brackish (SG 1.005 to 1.015) or marine water. Keep temperature at 22-28°C (72-82°F) and pH stable between 7.8 and 8.4.

Compatibility and Cohabitation: Excellent tankmate for other active brackish fish of similar size, such as Monos, Archerfish, and brackish puffers. Avoid keeping them with small or slow-moving fish that could be outcompeted or eaten.

Aquarium Breeding: Breeding in home aquariums is currently undocumented. In nature, they migrate to offshore marine reefs to spawn, a complex biological trigger that is extremely difficult to recreate in captive systems.

Risks and Diseases: Handle with extreme care; their dorsal spines carry a mild venom that causes severe pain if stung. Prone to skin parasites in poor water conditions. Ensure a highly varied diet to prevent nutritional deficiencies.