Black Kumpay Stiphodon Goby (Stiphodon atropurpureus)

A rare freshwater Stiphodon goby with dark male coloration, metallic blue-green striping, and specialized algae-grazing behavior for mature river-style aquariums.

The Black Kumpay Stiphodon Goby, Stiphodon atropurpureus, is a rare freshwater goby prized for its unusual dark body colour, metallic blue-green lateral stripe, and peaceful surface-grazing behavior. It is also searched as Black Kumbai Goby, Blue Neon Goby, Freshwater Neon Goby, and Stiphodon atropurpureus.

This species is especially valuable for aquarists who enjoy rare gobies, hillstream-style fish, planted river aquariums, and peaceful algae-grazing livestock. Mature males can develop a dark purple-black body with a bright metallic stripe, while females and juveniles are usually more subtle, patterned, or grey-brown.

Like other Stiphodon gobies, this is not a simple “cleanup fish.” It is a specialized stream goby that needs clean water, high oxygenation, mature biofilm, smooth grazing surfaces, and regular supplemental feeding.

Why this fish stands out

• Rare freshwater Stiphodon goby
• Also known as Black Kumpay Goby or Black Kumbai Goby
• Mature males can show dark purple-black body colour
• Metallic blue-green stripe gives strong contrast under good lighting
• Peaceful algae and biofilm grazer
• Excellent for mature planted tanks and river-style aquariums
• Generally safe with freshwater shrimp in suitable setups

Best for

• Rare goby collectors
• Stiphodon enthusiasts
• Planted aquariums with mature biofilm
• River-style aquariums
• Shrimp-safe community tanks
• Aquarists looking for a rare algae-grazing fish that is not a pleco

Topick Aquarium Insight

Black Kumpay Stiphodon Gobies should be sold and kept as rare stream fish, not as ordinary algae eaters. They graze constantly, but constant grazing does not always mean the fish is getting enough nutrition.

The key to long-term success is body condition. A healthy Stiphodon should have a full belly, strong grip, steady breathing, and active grazing behavior. Thin or sunken individuals are often difficult to recover, even if algae is visible in the aquarium.

Mature aquariums with biofilm-covered stones, algae-based foods, and stable oxygen-rich water give this fish a much better chance than brand-new clean tanks with no natural grazing surface.

Black Kumpay vs Blue Neon Stiphodon Goby

The name “Blue Neon Goby” is used loosely in the aquarium trade and can refer to different Stiphodon species. Stiphodon atropurpureus is often associated with a darker male body, metallic blue-green lateral stripe, and dusky to black dorsal fins.

Compared with Stiphodon semoni, which is often sold as Blue Neon Stiphodon Goby or Cobalt Blue Goby, Black Kumpay Stiphodon is better marketed around its darker body tone and stronger black-purple contrast. Both species require mature, clean, oxygen-rich aquariums and similar feeding care.

Colour & Sex Differences

Mature males show the strongest colour, especially when settled and confident. Females, juveniles, and stressed individuals can look much less colourful.

• Mature males: dark purple-black body tone with metallic blue-green stripe
• Females: more subtle grey, brown, or striped appearance
• Juveniles/subdominant males: may not show full colour immediately
• New arrivals: colour may fade temporarily during stress or acclimation

Colour usually improves after the fish settles into a stable aquarium with good food, clean water, flow, and low stress.

Behavior & Group Size

Black Kumpay Stiphodon Gobies are peaceful surface-grazing fish that spend much of their time on glass, stones, wood, and hardscape. They are not aggressive community fish, but males may show mild territorial or display behavior around preferred grazing spots.

They can be kept singly, but they are more interesting in groups. We recommend 3 or more when possible, especially in aquariums with enough grazing surfaces and food. A group with one male and multiple females is ideal when available.

Tank Setup

A mature, clean, oxygen-rich aquarium is strongly recommended. This fish should not be added to a brand-new tank with no biofilm or unstable water.

• Minimum recommended tank: 10 gallons for a single fish or pair
• 20 gallons or larger preferred for a group
• Mature aquarium with established algae and biofilm
• Moderate to strong flow preferred
• Strong aeration and clean water are important
• Smooth stones, driftwood, glass, and hardscape provide grazing surfaces
• Bright lighting can help grow natural biofilm and soft algae
• Tight-fitting lid recommended

A river-style layout with smooth stones, open flow, and stable oxygenation is ideal. Hardy plants such as Anubias, Bucephalandra, Java Fern, and mosses can work well because they provide surfaces for biofilm while tolerating flow.

Water Parameters

• Scientific Name: Stiphodon atropurpureus
• Common Names: Black Kumpay Stiphodon Goby, Black Kumbai Goby, Blue Neon Goby, Freshwater Neon Goby
• Temperature: 20–27°C
• pH: 6.5–7.5
• Adult Size: approximately 3–5 cm
• Temperament: Peaceful / mildly territorial among males
• Diet: Biofilm, soft algae, aufwuchs, algae-based foods, fine frozen foods
• Care Level: Intermediate

Stable, oxygen-rich water is more important than chasing exact numbers. Avoid hot, low-flow, low-oxygen aquariums, especially if the tank is heavily stocked.

Feeding

Black Kumpay Stiphodon Gobies are natural biofilm and algae grazers. They should not be expected to survive on aquarium algae alone, especially in very clean aquariums.

• Natural biofilm and soft algae
• Algae wafers
• Spirulina-based sinking foods
• Repashy-style gel foods on rocks
• Fine powdered or micro foods
• Frozen daphnia, cyclops, baby brine shrimp, or bloodworms in small amounts

Protein-rich foods should be used in moderation. Their long-term diet should lean toward biofilm, algae-based foods, and vegetable-rich grazing options rather than heavy meaty feeding.

One of the best feeding methods is to place algae-based gel food or fine sinking food on smooth stones where the gobies naturally graze. This reduces competition from faster fish and helps maintain body condition.

Tank Mates

Black Kumpay Stiphodon Gobies are best kept with peaceful fish that enjoy clean, well-oxygenated water. Avoid aggressive bottom dwellers or fish that outcompete them for food.

• Small rasboras
• Small danios
• White Cloud Mountain Minnows
• Peaceful small tetras
• Neocaridina and Caridina shrimp
• Small peaceful hillstream loaches
• Other compatible Stiphodon or small stream gobies

Avoid aggressive cichlids, puffers, large predators, rough bottom feeders, and very warm low-flow community tanks.

Shrimp Tank Compatibility

Black Kumpay Stiphodon Gobies are generally one of the safer goby choices for shrimp tanks because they focus on grazing biofilm and algae rather than hunting shrimp.

Adult shrimp are usually safe in a proper setup. Very tiny shrimplets can never be guaranteed in any community aquarium, but Stiphodon gobies are not active shrimp predators like many larger or carnivorous gobies.

Breeding

Stiphodon gobies do not normally reproduce successfully in standard freshwater aquariums. In nature, adults spawn in freshwater streams, but the larvae drift downstream and develop in marine conditions before returning to freshwater as juveniles.

Courtship and spawning behavior may occur in aquariums, but raising fry is not realistic for most hobbyists.

Canada-Wide Live Fish Shipping

Black Kumpay Stiphodon Goby is available from Topick Aquarium in Canada when in stock. Local pickup is available in Markham, Ontario, and Canada-wide live fish shipping may be available depending on weather, route, and livestock condition.

Important Note

This is not a heavy-duty algae control fish for neglected tanks. Black Kumpay Stiphodon Gobies are specialized grazing fish that require mature surfaces, clean water, oxygen, and regular supplemental feeding.

They may graze soft algae, diatoms, and biofilm, but they are not a solution for black beard algae, staghorn algae, or heavy long hair algae. For those algae issues, lighting, nutrients, flow, CO2 stability, and maintenance habits must be corrected.

A secure lid is recommended because Stiphodon gobies can jump and may climb glass or hard surfaces, especially in high-flow setups.

FAQ

What is Black Kumpay Stiphodon Goby?
Black Kumpay Stiphodon Goby is a trade name for Stiphodon atropurpureus, a rare freshwater stream goby also sold as Black Kumbai Goby, Blue Neon Goby, or Freshwater Neon Goby.

What is the scientific name?
The scientific name is Stiphodon atropurpureus.

Is Black Kumpay Goby the same as Blue Neon Goby?
In the aquarium trade, Stiphodon atropurpureus may be sold under Blue Neon Goby or Freshwater Neon Goby names. We use Black Kumpay Stiphodon Goby to emphasize the darker male colour form and avoid confusion with Stiphodon semoni.

Is it the same as Stiphodon semoni?
No. Stiphodon atropurpureus and Stiphodon semoni are different Stiphodon species, although they have similar care requirements and are often confused in the aquarium trade.

Why is my Black Kumpay Goby not very black or blue?
Colour depends on sex, maturity, dominance, stress level, and settling time. Mature confident males show the strongest dark body and metallic stripe, while females, juveniles, and stressed fish are usually more subtle.

Will it eat shrimp?
It is generally safe with adult freshwater shrimp and is not an active shrimp hunter. Very tiny shrimplets may still be vulnerable in any community tank.

Is Black Kumpay Stiphodon Goby a good algae eater?
It grazes biofilm, soft algae, diatoms, and surface growth, but it should not be expected to live on algae alone. Supplemental algae-based foods are important.

Does it need strong flow?
It does best in clean, oxygen-rich water with moderate to strong flow. Oxygenation and mature surfaces are more important than extreme current alone.

Can it live in a normal community tank?
Only if the tank is mature, clean, peaceful, and well-oxygenated. Hot, low-flow, unstable, or heavily stocked aquariums are not ideal.

Can it breed in freshwater?
Not normally. Spawning may happen, but the larvae require marine development and are not realistically raised in standard freshwater aquariums.