Sicyopus multisquamatus

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The Red Teardrop Goby, or Sicyopus multisquamatus, is a small freshwater goby associated with tropical streams in Indonesia. Its compact body, current-adapted fins and reddish markings make it appealing to aquarists who enjoy specialized fish. Like other sicydiine gobies, it depends on clean, highly oxygenated water with continuous movement. It remains relatively uncommon in the aquarium trade, making it better suited to aquarists who can recreate a stream environment and provide food regularly. A mature aquarium with established surfaces, strong circulation and suitable supplemental foods is more important than a heavily planted display. Its specialized habits should be understood before purchase.

General description

Sicyopus multisquamatus is a small rheophilic goby, meaning that it is adapted to streams with noticeable current. It spends much of its time resting on stones, moving in short bursts or using its fused pelvic fins as a suction disc. This structure allows it to remain close to the bottom without being swept away. It is better suited to a specialized aquarium than to a conventional community tank because it requires very clean, well-oxygenated water. The species is generally peaceful, although males may defend small resting or feeding areas. Its moderate to limited availability makes the Red Teardrop Goby most appropriate for aquarists who can plan filtration, circulation and feeding carefully.

Geographical origin and biotope

Reference country: Indonesia. The species is associated with Sulawesi and its small tropical streams flowing toward coastal areas. Its habitat includes clear, relatively low-organic streams with stone, pebble and gravel bottoms. Current is usually noticeable, especially in shallow sections and sloping areas. Mineral surfaces may carry a film of algae and microorganisms that gobies graze continuously. Streamside vegetation provides shade and helps moderate water conditions. In the aquarium, a rocky layout, permanent circulation and excellent oxygenation are therefore more appropriate than a densely planted, low-flow setup. Regular maintenance is important because these fish are sensitive to deteriorating water quality.

Precise location and local name

Sicyopus multisquamatus is reported from Sulawesi, Indonesia, in networks of small freshwater streams associated with island slopes. A precise locality or broadly established Indonesian vernacular name is not used here. In the aquarium trade, Red Teardrop Goby and Sicyopus multisquamatus are the most useful identification names. Because sicydiine gobies can look very similar, identification should ideally be supported by reliable collection information and photographs of adult fish. This is important because related species may be sold under the same trade label, even though their origins and care requirements may differ.

Appearance and physical features

Sicyopus multisquamatus has an elongated, slightly compressed body suited to holding position on substrates exposed to current. Its fused pelvic fins form a characteristic adhesive disc found in sicydiine gobies. Coloration may combine gray, brown and reddish tones, with a red or dark marking around the head and cheeks depending on the fish’s condition. The English name refers to the appearance of a red teardrop marking in well-colored individuals. The body has numerous visible scales, reflected in the specific name multisquamatus. Color intensity can change with stress, social status, lighting and general condition, so freshly imported fish may appear less colorful than settled specimens.

General diet

In nature, Sicyopus multisquamatus mainly grazes on biofilm growing on stones, including algae, diatoms and small associated organisms. In an aquarium, a diet made only of meaty tablets is not appropriate for its feeding strategy. The aquarium should contain mature surfaces with natural growth, supplemented frequently with fine vegetable-based foods, spirulina-rich tablets or preparations intended for substrate grazers. Small frozen foods can help during acclimation, but should not replace biofilm. Several small feedings are preferable to one large daily feeding. Careful observation is needed to confirm that every individual is actually eating, especially when stronger tank mates compete for sinking food. Clean water and established surfaces are essential.

Essential data

• Native river: Sulawesi, small coastal streams
• Local name used: No broadly established Indonesian vernacular name retained
• Origin of the scientific name: Genus Sicyopus; species described as multisquamatus
• Full-name etymology: multisquamatus means “many-scaled”; the detailed etymology of Sicyopus is not retained here
• Common/vernacular names: Red Teardrop Goby
• Family: Oxudercidae
• Subfamily: Sicydiinae
• Name pronunciation: si-si-oh-pus - mul-ti-skwa-ma-tus
• Discovery: Lieven Ferdinand de Beaufort, 1912
• Maximum adult size: About 5 cm
• Water temperature and pH: 23 to 27 °C; pH 6.8 to 7.8
• Stream appearance and surrounding vegetation: Clear, rocky streams shaded by riparian vegetation
• Typical tank mates: Stiphodon spp.; Lentipes spp.; Sicyopus spp.; Schismatogobius spp.
• Temperament and behavior: Peaceful, discreet, short-range territorial and mainly bottom dwelling
• Water depth: Shallow to moderate
• Sexual dimorphism: Males may show stronger coloration and more developed fins; distinction is variable
• Bottom structure and flow: Pebbles, stones and gravel; strong current and highly oxygenated water

For aquarium success

Success with Sicyopus multisquamatus depends on a mature aquarium, stable water and efficient circulation. Use smooth stones that provide several resting and grazing areas, provide generous biological filtration and prevent waste accumulation. The fish should have access to biofilm throughout the day, along with suitable supplemental foods. A tightly fitted cover is sensible because gobies may climb onto wet surfaces or jump when disturbed. Keeping them with small, peaceful fish may work, but fast or highly competitive species can prevent them from feeding properly. Their limited availability makes careful acclimation and quarantine especially worthwhile. Stable conditions and regular observation are the keys to long-term maintenance.