Poso goby

Geographical Origin and Habitat: Endemic to Lake Poso, an ancient tectonic lake located in Central Sulawesi, Indonesia. It inhabits shallow, nearshore areas of the lake with sandy and rocky substrates.\n

Taxonomy and Morphology: Belongs to the family Gobiidae, genus Mugilogobius. It features a stocky body, upward-looking eyes, and two separate dorsal fins. The pelvic fins are fused to form a suction disc on the belly.\n

Social Behavior: Strictly benthic and territorial, especially males defending small crevices between rocks. Peaceful towards midwater swimming species, but may fight with conspecifics or other bottom-dwellers.\n

Coloration and Sexual Dimorphism: Displays a sandy grey-brown body pattern with dark vertical bands and horizontal blotches for camouflage. Adult males are generally larger and show darker, more intense coloration during spawning.

Aquarium Setup: Requires a tank of at least 15-20 gallons (60-80 liters) decorated with flat stones forming small caves and crevices. Use fine sand or smooth gravel as a substrate to prevent physical damage to the fish.\n

Diet and Feeding: Carnivore and micro-predator. Prefers live or frozen foods that reach the bottom, such as bloodworms, mysis, brine shrimp, and micro-worms. Sinking pellets of high quality can be accepted over time.\n

Water Quality: Requires stable parameters replicating Lake Poso: pH 7.5-8.2, moderate hardness (GH 6-12), and temperature between 24-28°C (75-82°F). Efficient filtration with moderate flow is ideal.\n

Compatibility and Cohabitation: Best kept with peaceful species from the same region, such as Sulawesi rainbowfish or small lake shrimps (provided there is cover). Avoid large or aggressive tankmates.\n

Aquarium Breeding: Spawning occurs inside a cave or narrow tube. The male guards the eggs until they hatch. Raising the tiny fry requires microscopic live foods (rotifers or infusoria) during the initial stages.\n

Risks and Diseases: Highly sensitive to sudden temperature shifts and elevated ammonia or nitrite levels. Susceptible to fin rot or fungal infections if injured by sharp rocks.