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The Bumblebee Goby, Brachygobius xanthomelas, is a small, charismatic species of goby known for its distinctive black and yellow banding pattern. These fish are typically found in brackish water environments, though some populations can adapt to freshwater. They are benthic dwellers, spending most of their time on the substrate, often perching on rocks, driftwood, or plant leaves. Their small size and unique coloration make them popular in the aquarium trade, particularly for specialized brackish setups.
Physical Characteristics
- Body shape
- elongated
- Coloration
- Distinctive alternating bands of bright yellow to orange and dark black to brown. The number and width of bands can vary slightly between individuals and species within the genus. The fins are typically translucent with some dark pigmentation.
- Scale type
- ctenoid
- Mouth position
- superior
- Distinctive features
- Four to five prominent black bands on a yellow to orange body., Two dorsal fins, the first spiny and the second soft-rayed., Pelvic fins fused into a suction cup-like disc.
- Dorsal fin
- Two dorsal fins; the first dorsal fin has 6-7 spines, and the second dorsal fin has 1 spine and 7-9 soft rays.
- Tail fin
- Rounded to slightly emarginate caudal fin.
- Pectoral fin
- Large, fan-like pectoral fins.
- Distinctive fins
- Pelvic fins are fused to form a ventral adhesive disc, characteristic of gobies, used for clinging to surfaces.
Identification Tips
Coloration
Look for the characteristic alternating black and yellow/orange bands. The number and intensity of bands can help distinguish from other Brachygobius species.
Size
They are very small fish, typically not exceeding 4 cm (1.6 inches) in total length.
Pelvic Fins
Observe the fused pelvic fins forming a suction cup, a definitive goby characteristic, which they use to cling to surfaces.
Behavior
Their typical behavior of perching on surfaces and darting short distances is also a good indicator.
Habitat
- Water type
- brackish
- Depth
- Shallow waters, typically less than 1 meter.
- Environment
- Found in coastal estuaries, mangrove swamps, and slow-moving rivers with brackish water. They prefer areas with dense vegetation, roots, and rocky or sandy substrates for hiding and perching.
- Geographic range
- Southeast Asia, including countries like Thailand, Malaysia, Indonesia, and Borneo. Specific distribution varies by species within the Brachygobius genus.
Aquarium Information
- Care level: intermediate
- Temperament: peaceful
- Diet: carnivore
- Minimum tank size: 10 gallons (38 liters)
- Temperature: 22-28°C (72-82°F)
- pH level: 7.0-8.5
- Hardness: 10-20 dGH (specific gravity 1.002-1.010 for brackish)
- Compatibility: Best kept in species-specific tanks or with other small, peaceful brackish water fish that are not fin-nippers. Avoid very active or large tank mates that might outcompete them for food or stress them.
- Special requirements: Requires brackish water conditions for optimal health and longevity, though some individuals can adapt to hard freshwater. A well-established tank with plenty of hiding spots (caves, driftwood, dense planting) and a sandy or fine gravel substrate is essential. They are sensitive to water quality fluctuations and require stable parameters. Live or frozen foods are preferred.
Wild Information
- Conservation status: least concern
- Seasonality: Not applicable for wild harvest; available year-round in the aquarium trade.
- Market price: Low to moderate
- Commercial importance: medium
- Taste: Not typically consumed due to small size.
- Texture: Not typically consumed due to small size.
- Nutritional value: Not typically consumed due to small size.
Key Facts
Brackish Water Specialistinteresting
While some gobies can tolerate freshwater, Brachygobius xanthomelas thrives and lives longest in brackish water, making it a specialized aquarium inhabitant.
Perching Behaviorbehavior
Bumblebee Gobies are often observed perching on rocks, leaves, or driftwood, using their fused pelvic fins as a suction cup to hold their position against currents.
Carnivorous Dietbehavior
These gobies are strict carnivores, primarily feeding on small invertebrates in the wild. In captivity, they prefer live or frozen foods over flakes or pellets.
Small Size, Big Personalitybehavior
Despite their diminutive size, Bumblebee Gobies exhibit interesting territorial behaviors, especially during breeding, where males will guard their eggs.
Safety Information
Safe- Safety level: safe
- Venomous: No
- Edibility: not recommended
- Handling notes: No specific handling precautions are required beyond standard fish handling practices to minimize stress and injury to the fish. They are small and delicate.
Similar Species
Golden Banded Goby
Brachygobius doriae
B. doriae typically has fewer (3-4) and often broader black bands compared to B. xanthomelas, which usually has 4-5 narrower bands. B. doriae also tends to be slightly larger and more robust.
Knight Goby
Stigmatogobius sadanundio
While also a brackish goby with some banding, the Knight Goby is generally larger, has a more mottled or spotted pattern in addition to bands, and its bands are often less distinct and more irregular than the sharp, contrasting bands of Brachygobius species.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Gobiiformes
- Family
- Gobiidae
- Genus
- Brachygobius
- Species
- xanthomelas
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