More info
Datasheet
| Minimum Tank Size | 60 litres / 15.85 US gallons |
| Maximum Size | 5.1cm / 2.01inches |
| Temperature | 22°C / 71.60°F - 28°C / 82.40°F |
| Hardness | 2.02dgH / 36ppm - 12.05dgH / 215ppm |
| pH | 6.5-7.5 |
General Description
Sicyopus exallisquamulus, a species of sleeper goby, belongs to the family Gobiidae within the Perciformes order. Identified by a combination of unique characteristics, this goby species appears misidentified in the aquarium trade as Sicyopus jonklaasi. Complex in nature, it is diagnostically different from congeners and typically inhabits well-oxygenated streams.
Aquarium Setup
Maintaining Sicyopus exallisquamulus in an aquarium requires mindful consideration. It is recommended to set up a clean, well-oxygenated tank with appropriate filtration, additional aeration, and adequate water turnover. The tank should include a varied substrate, water-worn rocks, and pebbles. Providing ample hiding spots and minimizing aggression through rock structuring is beneficial. Weekly water changes and a secure cover to prevent jumping are essential. Compatible aquatic plants can be introduced, with suggested genera like Microsorum and Anubias.
Behaviour
Sicyopus exallisquamulus exhibits a peaceful demeanor, suitable for a community tank with carefully selected tankmates. The species tends to exist peacefully with certain pelagic fish like Tanichthys and smaller Danio species. In a community set-up, it is advisable to avoid aggressive or territorial species. Male S. exallisquamulus may not be gregarious, but females tend to coexist in loose groups. The recommended ratio is a single male with two or more females.
Feeding and Diet
As a specialized predator, S. exallisquamulus accepts small live or frozen foods such as bloodworms, Artemia, and Daphnia. Reports suggest that this species tends to ignore dried foods and may not be suitable for companioning with small invertebrates in the aquarium due to its predatory feeding behavior.
Reproduction & Dimorphism
Observations indicate that S. exallisquamulus has a complex breeding strategy involving amphidromy, where post-hatch larvae migrate downstream to marine conditions before returning to freshwater streams. Despite courtship behavior in captivity, raising fry has proven challenging. Adult males exhibit extended unpaired fins, pronounced jawlines, and enhanced orange pigmentation compared to females. The genital papilla shape and pigmentation variations aid in distinguishing between the sexes.
Habitat and Distribution
Sicyopus exallisquamulus is native to short coastal streams of tropical islands, particularly identified from Halmahera in the Maluku Islands, Indonesia, and possibly other regions within the Maluku archipelago. Found in habitats above waterfalls with clear, well-oxygenated water, S. exallisquamulus showcases adaptability to utilize available food sources in its ecosystem.
Water Conditions:- Hardness: 36-215ppm- pH: 6.5-7.5- Temperature: 22-28°C