TankStocking

Bumblebee Goby Care Guide

The bumblebee goby, Brachygobius doriae, is a tiny (~3-4 cm) black-and-gold bottom-dweller that is mis-sold as an easy freshwater community fish and usually dies slowly because of it. Two facts decide every purchase. First, "bumblebee goby" is a trade name covering several near-identical Brachygobius species with different water needs, and most of the trade stock - including B. doriae - does best in slightly BRACKISH water, so plain freshwater is the wrong default. Second, it usually refuses dry food and needs small live or frozen foods or it starves. Shy, easily out-competed and squabbly with its own kind, it belongs in a gentle species-only (or brackish-only) tank, not a general community.

By the TankStocking team · methodology-driven, sourced from aquarium care references Data v2026.06 · last reviewed How we judge this →

Bumblebee Goby at a glance

The sourced figures the welfare engine uses to judge Bumblebee Goby — the parseable key facts.

Key facts — Bumblebee Goby (Brachygobius doriae)
Adult size3.5 cm
Minimum tank10 US gal
Minimum group6+ (pair/group)
TemperamentTerritorial
Temperature range22–28°C
pH range7–8.5
BioloadLow
Swim levelBottom
Beginner-friendlyNo — advanced

Where it comes from

B. doriae comes from lowland coastal Borneo - Sarawak, Brunei, the Natuna Islands and the Kapuas system - where it lives in mangrove swamps, estuaries, tidal streams and some ancient tea-coloured peat swamps. Seriously Fish records warm, hard, alkaline and often brackish water (22-28 C, pH 7.0-8.5, 143-357 ppm), and many populations swing between freshwater and brackish with the tide. That estuarine origin is the whole care sheet: hard, alkaline, usually lightly salted water suits the trade fish, not the soft acidic water beginners often default to; the invertebrate-rich tidal mud means a live or frozen micro-diet; and the calm, structured bottom means low flow, lots of floor space and plenty of caves.

Did you know?

  • One trade name, many species: "bumblebee goby" covers several Brachygobius species with different water needs, one of the hobby's classic mislabelling traps and the reason so many die in plain freshwater.
  • The freshwater outlier is B. xanthomelas - the one species reliably kept in freshwater, and "not believed to inhabit brackish areas" - the exception that proves the brackish rule.
  • A bumblebee in disguise: the bold black-and-gold banding is warning-like colour on a goby smaller than a thumbnail (~3-4 cm).
  • A cave-brooding dad: the male guards a clutch of roughly 150-200 eggs inside a tiny cavity until they hatch - outsized parental care from a 3 cm fish.
  • Despite the peat-swamp populations, it is not a soft-water blackwater fish - it evolved in hard, alkaline, often salty estuaries.

Tank size — and why

Around 10 US gallons - Seriously Fish's 45 by 30 cm footprint - is the floor for a proper group, with a 5-gallon holding only one or two fish. The driver is not swimming volume (a 3-4 cm fish needs little) but FLOOR AREA and territory. It is a bottom-dweller, so usable floor space and the number of separate hidey-holes decide how many gobies can hold non-overlapping mini-territories. A longer tank broken up with caves lets you keep the group of six or more that spreads male aggression, instead of concentrating it on one or two subordinates.

As a guide, a 20-gallon tank comfortably suits a starter group of about 8–12 Bumblebee Goby. As floor-dwelling shoalers they want bottom area, not water column, so a bigger group or added tankmates pushes you toward a larger footprint rather than fitting in alongside.

See it to scale

Adult Bumblebee Goby reach only about 3.5 cm (1.4 in) long — close to the size they are sold at, so what you see is roughly what you get. The catch is the group: a proper shoal still needs about a 10-gallon tank, around 51 cm long.

Adult size is sourced; tank length is approximate for a standard 10-gallon aquarium.

Water parameters in practice

In the tank: 22–28°C · pH 7–8.5 · Low bioload · group 6+ (pair/group)

Aim for 25-28 C, hard and alkaline at pH 7.5-8.5, and - for most trade stock - light brackish around specific gravity 1.002-1.006, set with marine or aquarium salt and checked with a hydrometer or refractometer. This is the contested, load-bearing point: B. xanthomelas is the one species that reliably does well in pure freshwater, but because shop fish are routinely mislabelled and you usually cannot tell the species by eye, brackish is the safer default unless you have confirmed a freshwater-raised fish. The governing rule is to match the water the fish was raised in - so ask - and to keep it stable. The most common chemistry error is keeping it soft, acidic and salt-free, which slowly wears the fish down. Note that brackish water limits live plants to salt-tolerant species such as Java fern and Anubias, or hardscape.

Will it thrive in your water?

The comfortable range for Bumblebee Goby is about 22–28 °C (72–82 °F) and pH 7–8.5. Test your own tap water against it below.

These are the sourced comfortable ranges. Stable water matters more than chasing an exact number — a steady reading inside the band beats a "perfect" one that drifts. Some fish also need a particular water hardness (GH); where that applies, the prose above covers it.

Diet & feeding

In the wild it is a micropredator picking small invertebrates, crustaceans and zooplankton off the substrate (FishBase trophic level 3.4). The make-or-break fact: it usually refuses dry food and needs small live or frozen foods, which Seriously Fish calls essential while "dried products [are] ignored". Feed live or frozen baby brine shrimp (Artemia), Daphnia, cyclops, bloodworm, micro-worms and blackworm in small daily portions placed where the gobies can reach them on the bottom. It is a slow, deliberate hunter that is easily out-competed by faster mid-water feeders - a core reason it fails in community tanks and quietly starves while looking fine for weeks.

Gear & setup

Give it fine sand, low flow ("water filtration should be kept a bit weak") and plenty of caves and hides - ceramic tubes, coconut shells, rock crevices and driftwood - so every fish can claim its own bolt-hole. A standard nano lid is enough; jumping is a minor risk. For brackish stock, dose marine or aquarium salt to the target gravity and lean on hardscape or salt-tolerant plants rather than a full planted layout. As with any small volume, mature the tank before stocking, because brackish nano tanks still swing fast.

Temperament & behaviour

It is peaceful toward other species but territorial with its own kind, and timid overall. Males hold and defend mini-territories; the standard fix is a group of six or more so aggression is diffused rather than focused on one or two fish. At 3-4 cm the cost is stress and feeding suppression of subordinates, not real injury. Being shy, it hides and loses colour alongside bold tankmates, which is why a quiet species-only or brackish-only set-up shows it at its best.

Group & social needs

Keep six or more. Fewer fish in too little floor space concentrate male territoriality on the weaker individuals, and the gobies hide. It is not a schooler - the group exists to spread aggression and let you see natural behaviour, not to form a shoal. Seriously Fish is blunt that it "does not make an ideal community fish and [is] best kept in a species-specific set-up", and many keepers run it species-only, which is usually the kindest option.

Compatible tank mates (preview)

A short, engine-cleared shortlist — the species TankStocking's welfare engine clears with Bumblebee Goby and that suit its size and temperament best. Tap a name for its care guide, or use + to load the pairing in the planner.

One caveat on the shrimp and snails here: engine-cleared means a size, temperament and water-needs fit — it is not a guarantee of safety. An individual Bumblebee Goby may still hunt shrimp or pick at small snails, and temperament varies from fish to fish, so add invertebrates cautiously, give them cover, and watch the first encounters.

This engine-cleared shortlist is Bumblebee Goby's tankmate surface for now — a dedicated tank-mates guide can follow for high-demand species.

Breeding & sexing

Moderate to breed, hard to raise. Sexing is subtle: females are rounder-bodied, especially when gravid, with a brighter first yellow band, while males slim down, intensify colour and show a reddish tinge in breeding condition. It is a cave spawner - a male selects and defends a small cavity (flowerpot, tube or shell), the female lays inside, and the male guards a clutch of roughly 150-200 eggs (FishBase) until they hatch in about seven to nine days. The fry are minuscule and need infusoria-grade first foods (Paramecium, rotifers) before they can take Artemia nauplii. Condition the adults heavily on live food and keep the water stable and brackish.

Lifespan

About 2-5 years, with AquariumStoreDepot citing 2-3 for typical kept fish. The usual killers are avoidable: a brackish-needing fish kept in plain freshwater becomes dull, listless and short-lived; slow starvation on dry food or when out-competed; stress from bold or large tankmates; and unstable water in a small, immature nano. A thin, fading, hiding goby is almost always under-fed, out-competed or in the wrong water, not suffering an exotic disease.

Common mistakes

  • Buying it as an easy freshwater community fish - it is neither reliably freshwater, easy, nor community-friendly, and that is the most common systemic killer.
  • Keeping brackish stock in plain freshwater. Most trade fish want light brackish (SG ~1.002-1.006), hard and alkaline; confirm the species and source and match the water it was raised in.
  • Expecting it to eat flakes or pellets. It usually won't, and it starves slowly while looking fine for weeks - feed live or frozen micro-foods daily.
  • Housing it with faster feeders or bigger fish. It is out-competed at feeding and is itself bite-sized, so it belongs in a gentle species-only or brackish-only tank.
  • Keeping too few fish or too little floor space. Male territoriality then lands on subordinates - keep six or more with a cave each.
  • Adding it to a dwarf-shrimp colony you care about. Adult shrimp are usually safe, but as a substrate micropredator it picks off shrimplets and shrimp fry.

Signs of trouble

  • A thin, sunken or pinched belly - almost always under-feeding or out-competition, not disease.
  • Colour fading and greying - stress from bold tankmates, the wrong (soft, salt-free) water, or an unstable tank.
  • Hiding and refusing food - the prelude to the slow-starvation decline; check that live or frozen food is reaching the bottom.
  • Listlessness and dullness in a freshwater tank - the classic sign that a brackish-needing fish is in the wrong chemistry.
  • Clamped fins and lethargy - general stress; check temperature stability, salinity and water quality first.

Is this fish right for you?

Do not buy a bumblebee goby if you only have a freshwater community tank with active feeders, if you can't or won't run a salted, hard, alkaline brackish species tank, or if you can't supply small live and frozen foods daily. Because the trade name covers several species with different water needs, ask how the fish were raised - freshwater or brackish - and default to brackish if the answer is unknown. On stock, pick plump, well-coloured, actively-foraging fish; a thin, pale, hiding shop fish is a warning sign. B. doriae is assessed by the IUCN as Least Concern (2018), so the conservation pressure is mild, but the welfare bar is high - this is an experienced keeper's fish, not a beginner's.

Bringing one home

Match the water the fish was raised in and acclimate slowly, especially when moving between salinities - a sudden jump in gravity or hardness stresses a small fish. Float to match temperature, then add tank water gradually before netting the goby across and leaving the shop water behind. Mature the (usually brackish) tank before stocking, and quarantine new fish, since shy bottom-dwellers fail fast in an immature, swinging nano.

Common questions

Are bumblebee gobies freshwater or brackish?

Most trade stock, including B. doriae, does best in slightly brackish water (SG ~1.002-1.006), hard and alkaline. Only B. xanthomelas is reliably freshwater, and because shop fish are mislabelled, brackish is the safer default unless you have confirmed a freshwater-raised fish. Match the water the fish was raised in and ask the shop.

What do bumblebee gobies eat - will they take flakes?

They are micropredators that usually refuse dry food. Feed small live or frozen foods - baby brine shrimp, Daphnia, cyclops, bloodworm and micro-worms - placed on the bottom where the slow-feeding gobies can reach them, or they starve while looking fine for weeks.

Are bumblebee gobies good for beginners?

No. They need (usually) brackish, hard, alkaline water, live or frozen food, and a quiet species-only tank, and they are easily out-competed and mislabelled at the shop. This is an experienced nano-keeper's fish.

What can live with a bumblebee goby?

Best of all, just more bumblebee gobies in a species-only tank. If you insist on tankmates, use only calm, non-competitive, brackish-tolerant fish such as mollies that share the salty, hard water and won't out-eat the gobies. Standard freshwater community fish are the wrong water and out-compete them at feeding.

How many bumblebee gobies should I keep?

Keep six or more in a tank with plenty of floor space and a cave each. Fewer fish concentrate male territoriality on the weaker individuals; a larger group spreads the aggression and lets you see natural behaviour.

Can bumblebee gobies live with shrimp?

Adult shrimp are usually safe, but as a bottom-dwelling micropredator the goby picks off shrimplets and shrimp fry, so it will steadily erode a dwarf-shrimp colony you are trying to grow. It is not a snail-crushing specialist like the dwarf puffer - adult snails are generally fine - but tiny snails are also at some risk.

Plan your tank: the planner below is pre-set to 20 gallons. Add Bumblebee Goby and any tankmates for a live welfare verdict.

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      Verdict

      Sources & confidence

      Sources & confidence (7 species)

      These back the Bumblebee Goby figures and the previewed tank mates above. Each figure is read from the TankStocking species database (v2026.06); below is the care reference behind it and how confident we are in that data. Confidence reflects the source quality, not whether any pairing is safe. Full source list and the welfare model are on the methodology page.

      • Bumblebee Goby Brachygobius doriae — Seriously Fish (seriouslyfish.com/species/brachygobius-doriae) high confidence
      • Amano Shrimp Caridina multidentata — Aquarium Co-Op amano shrimp care; Aquadiction high confidence
      • Assassin Snail Anentome helena (Clea helena) — The Shrimp Farm (theshrimpfarm.com/posts/assassin-snail-care) high confidence
      • Ghost Shrimp (Glass/Grass Shrimp) Palaemonetes paludosus — The Shrimp Farm (theshrimpfarm.com/posts/shrimp-caresheet-ghost-shrimp-palaemonetes-sp) medium confidence
      • Mystery Snail Pomacea bridgesii — Aquarium Breeder; Aquatic Arts mystery snail guides high confidence
      • Nerite Snail Neritina/Vittina spp. — Aquarium Co-Op nerite snail care; Aquatic Arts high confidence
      • Bamboo Shrimp (Wood/Fan Shrimp) Atyopsis moluccensis — Aquariadise (aquariadise.com/caresheet-bamboo-shrimp-atyopsis-moluccensis) high confidence
      Care-guide sources (8)

      This guide synthesises the references below; where they disagree, the range and the disagreement are noted in the text above. The figures in the key-facts box are read from the TankStocking species database (v2026.06). Full welfare model on the methodology page.

      More on Bumblebee Goby

      Related guides on TankStocking — each scored by the same welfare engine as the planner.

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      This care guide is a sourced planning reference, not veterinary advice — individual fish, filtration and maintenance all matter. Cycle the tank, test your water, and observe your fish. How TankStocking works →