Singapore Mono

This species is native to the eastern Indian Ocean, including the coasts of India, Sri Lanka, and Singapore. It inhabits shallow coastal waters, estuaries, bays, and mangrove swamps, moving between freshwater, brackish, and marine environments.

Member of the Monodactylidae family. It features a highly laterally compressed, diamond-shaped body. In aquariums, it grows to a maximum height and length of about 12 cm. The dorsal and anal fins are tall and scale-covered, forming a triangle.

An active, peaceful, and tightly schooling fish. It must be kept in groups of at least 5 to 6 individuals to prevent shyness. They establish a mild social hierarchy and swim dynamically in the mid-to-upper water levels.

Body is bright silver with a metallic sheen. It has two dark vertical bands on the head: one running through the eye and another across the operculum. The tips of the dorsal and anal fins are yellowish-green with black margins. No visible dimorphism.

Requires a spacious tank of at least 250 liters for a school. Provide plenty of open swimming area and decorate with driftwood to mimic mangrove roots. Aquatic plants are difficult to keep, as the fish will nibble on them and they cannot tolerate high salinity.

Voracious omnivore. Accepts high-quality flakes, floating pellets, and frozen foods like brine shrimp, mysis, and bloodworms. It is essential to provide vegetable matter such as spirulina flakes, nori sheets, or blanched spinach to ensure good health.

While juveniles tolerate freshwater, adults must be transitioned to brackish or marine water to survive long-term. Maintain temperature at 24-28°C, pH at 7.5-8.5, and salinity between SG 1.005 and 1.015 using marine salt. High-flow filtration is recommended.

Peaceful and suitable for community tanks with brackish species of similar size, such as archerfish, scats, and other monos. Avoid keeping them with very small or slow-moving fish, which may be stressed during the school's high-speed feeding frenzies.

No successful breeding cases have been documented in home aquariums. In nature, they are protandrous hermaphrodites that migrate to seawater reefs to release pelagic eggs, a complex life cycle that has not been replicated in captivity.

Highly sensitive to poor water conditions. Keeping them in freshwater indefinitely will lead to fin rot, fungal infections, and faded colors. Maintain high oxygen levels and perform regular water changes to prevent stress and disease.