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Freshwater Bumblebee Goby

Brachygobius xanthomelas

Fishes › Gobies and sleepers (Gobiiformes) › Gobiidae (Gobies)

Brachygobius xanthomelas is a species of goby from the subfamily Gobionellinae which occurs in Peninsular Malaysia, Singapore and on the island of Borneo.

Aquarium hobby
Experience: Intermediate
Freshwater Bumblebee Goby
Photo: Frank M. Greco, CC BY 3.0, via Wikimedia Commons
FamilyGobies
Adult lengthup to 0.8 in
WaterFreshwater
HabitatLives in freshwater. Stays near the bottom

Care at a glance

Species-specific aquarium care

  • Tank: At least 24 in long and 12 in front to back for one adult (adults commonly reach about 0.8 in / 2 cm).
  • Water: Freshwater.
  • Layout: Lives on or near the bottom: floor space and hiding places matter more than height.

Calculated from this species' own FishBase record: tank size from its typical adult length and swimming zone, water values from its recorded ranges. The group guide below fills in general care.

Care guide

Species care notes

  • Tank: a base of at least 18 × 12 in (roughly 11 US gallons); space needed is rated “modest tank”.
  • Water: a fairly wide range, from slightly acidic to slightly alkaline, 72–82 °F, pH 7–8.5, 8–20 dGH.
  • Behaviour: temperament species tank; a shoaling fish best kept in a group of six or more; not a community fish.
  • Difficulty: Moderate (Seriously Fish rating).

Short excerpts from the species profile:

  • Setup: “Provide plenty of hiding places and cover, the idea being to create broken lines of sight to allow weaker individuals to escape continual attention from dominant fish.”
  • Diet: “Small live foods such as Artemia, Daphnia, etc., should be considered essential although some specimens will learn to accept frozen alternatives.”
  • Tankmates: “Does not make an ideal community fish and best kept in a species-specific set-up.”

From the Seriously Fish profile for this species, which has the full habitat, maintenance, diet, behaviour and breeding write-up 167

Group care guide

Gobies

Applies to most species in this group. Habitat: The listed gobies span marine sand burrows and rocky coasts as well as freshwater streams, where Stiphodon grazes biofilm in clear, oxygen-rich water. Individual species can differ, so compare with the species numbers above and the linked sources.

Level 3 is an editorial rating. No family-wide temperature is assigned: V. puellaris is sourced at 72–78°F, S. ornatus at 68–82.4°F, and Lythrypnus dalli is a cool-water coastal species. Do not automatically give L. dalli tropical reef care. Stiphodon adults live in freshwater despite marine larval development. These minima do not establish housing for Cryptocentrus, V. strigata, Amblygobius, Rhinogobiops or Neogobius; confirm species-specific needs before acquisition.

Housing & setup

  • For Valenciennea puellaris, provide at least 30 US gallons, live sand and a populated attached refugium.
  • For Stiphodon ornatus, provide a base at least 80 × 30 cm (about 31 × 12 inches).
  • Provide mature, illuminated, algae-covered rocks and strong oxygenation for Stiphodon.
  • Seat Stiphodon rocks directly on the tank base, break sight lines with refuges and fit a tight cover.
  • V. puellaris is sourced at specific gravity 1.020–1.025 and pH 8.1–8.4; adult Stiphodon require freshwater, pH 6.5–7.5 and 2–12 dGH.

Sources 918919920921

Diet

  • For Valenciennea: live or frozen mysis and brine shrimp, fed frequently.
  • For Valenciennea: live blackworms and prepared carnivore foods.
  • For Stiphodon: mature algal biofilm and associated microorganisms.

Sources 918919920921

Social life

  • Valenciennea puellaris fights conspecifics unless they are a mated pair. Separate Stiphodon male territories with rockwork; one social arrangement cannot represent this family.

Sources 918919920921

Health watch

  • Ammonia toxicity.
  • Nutritional deficiencies.

Sources 918919920921

Understanding the animal

About this animal

About this animal

It is a little known species which occurs in the aquarium trade.

Quoted from the Wikipedia article “Brachygobius xanthomelas” (CC BY-SA 4.0) 174

In the wild

In the wild

From this species’ own FishBase record (habitat, bottom type, water and breeding data), not its family. Good care copies these conditions.1

Where it livesLives in freshwater. Stays near the bottom.
Water it lives inFreshwater.
ClimateTropical climate.
  1. FishBase species summary: Brachygobius xanthomelas
Native climate (measured)

Native climate (measured)

Warm-season highsabout 89°F (up to 97°F in the hottest sampled areas)
Cool-season lowsabout 71°F (down to 64°F in the coldest sampled areas)
Average temperature78–82°F across sampled records
Relative humidity74–81% on average (driest month about 74%)
Rainfallabout 2399 mm a year

Measured at 14 wild occurrence records sampled against WorldClim 2.1 climate data (1970–2000 averages). Air conditions in the range are ecological context, not enclosure settings: microhabitats such as burrows, leaf litter or basking rocks can be cooler, warmer or more humid.

From the sources

From the sources

Quoted from the matching sections of reputable sources for this exact species. Specialist databases are used first; Wikipedia (community-edited, CC BY-SA 4.0) only fills gaps. Other sources are short credited quotes.

Where it livesHome ranges Population dynamics Growth parameters Max. ages / sizes Length-weight rel. Length-frequencies Mass conversion Recruitment Abundance Life cycle Reproduction Maturity Maturity/Gills rel. — FishBase

Data and studies

The numbers

The numbers

Each bar is what one source reports. Where several sources weigh in, the dashed gold band marks their average.

Adult length

Average of sources0.8in
FishBase 1640.8
Seriously Fish species profiles 1670.8

Maximum recorded length. Measured as standard length (snout to the base of the tail, not counting the tail fin). Fish in home aquariums often stay smaller than wild records.

Water temperature

Reported72–82°F
Seriously Fish species profiles 16772–82

Range the species tolerates; aim for the middle.

pH

Reported7–8.5
Seriously Fish species profiles 1677–8.5

Water hardness

Reported8–20dGH
Seriously Fish species profiles 1678–20

Minimum tank footprint

Reported18in
Seriously Fish species profiles 16718

Seriously Fish recommends a tank base of at least 18 × 12 in (about 11 US gallons).

Sources for this sheet

  1. FishBase (Froese & Pauly, eds.), version 24.07 Peer-reviewed researchThe global scientific database on fishes, maintained by a consortium of research institutions; every value is referenced.
  2. Seriously Fish species profiles Experienced keeper or breederLong-running aquarium reference written and peer-checked by experienced fishkeepers and ichthyologists; each profile covers habitat, tank size, water, diet, behaviour and breeding.
  3. Seriously Fish — Stiphodon ornatus Experienced keeper or breederAdded in the 2026 source-checked care-guide review.
  4. LiveAquaria — Diamond Watchman Goby Experienced keeper or breederAdded in the 2026 source-checked care-guide review.
  5. Tropical Fish Hobbyist — Gobies in My Aquarium Experienced keeper or breederAdded in the 2026 source-checked care-guide review.
  6. Merck Veterinary Manual — Disorders and Diseases of Fish Zoo, university or veterinaryAdded in the 2026 source-checked care-guide review.
  7. Wikipedia (species article) Community referenceFree encyclopedia; useful overviews with their own citations. Intro text is quoted under CC BY-SA 4.0.
  8. iNaturalist (captive observations) Community referenceCommunity observation platform run by the California Academy of Sciences and National Geographic; observations marked captive show animals living in homes, zoos and aquariums.