QUICK STATS

Care Level: Moderate
Diet: Omnivore
Temperament: Peaceful
Reef-Safe: Yes
Approximate Purchase Size: 2-4"
Approximate Max Size: Around 5-6"
Recommended Tank Size: 30 Gallons or Larger

BLACK CHIN DIAMOND GOBY

The Black Chin Diamond Goby is a peaceful sand-sifting goby known for its clean body pattern, bottom-dwelling behavior, and constant substrate-sifting activity. Like other Diamond Goby and Sleeper Goby varieties, it spends much of its day taking mouthfuls of sand, filtering out tiny foods, and dropping the sand back down like a tiny underwater landscaper with no respect for your aquascaping choices.

Black Chin Diamond Gobies are popular in reef aquariums because they help keep the sandbed stirred and aerated. Their natural sifting behavior can reduce detritus buildup on the surface of the sand and give the aquarium a cleaner appearance. That said, they should not be treated as a complete maintenance plan. They are fish, not unpaid janitorial staff with fins.

This species is generally peaceful and reef-safe. It should not bother corals or most invertebrates, but it may bury low-placed coral frags or move sand onto nearby corals while sifting. So yes, reef-safe, but potentially rude with sediment. A very specific crime.

Note: Image is a representation of what to expect. The fish you receive may vary slightly in size, color, markings, and overall appearance.

AQUARIUM REQUIREMENTS

AQUARIUM SIZE

A minimum tank size of 30 gallons or larger is recommended for a Black Chin Diamond Goby. While some individuals can do well in smaller established systems, larger tanks provide more sandbed area, more natural food availability, and better long-term stability.

For best results, provide plenty of open sandbed space. This fish spends much of its time on or near the bottom of the aquarium, so usable sand surface matters more than just total gallon size.

HABITAT RECOMMENDATIONS

Black Chin Diamond Gobies do best in established aquariums with a soft sandbed, live rock, and stable water quality.

Aquascaping: Provide live rock, caves, and open sandbed areas. Make sure rockwork is stable and placed securely, since sand-sifting gobies can dig under rocks and create burrows. Gravity remains undefeated and deeply unsympathetic.

Substrate: Fine sand or soft aragonite is strongly recommended. Avoid sharp, coarse, or jagged substrate that could irritate the fish’s mouth or gills while it sifts.

Rockwork: Live rock is useful for shelter, biological filtration, and territory. Leave open sand areas for natural sifting behavior.

Tank Maturity: A mature aquarium is preferred. Established sandbeds contain more natural microfauna and food particles for the goby to sift through.

Tank Cover: A tight-fitting lid is strongly recommended. Gobies are well-known jumpers, because apparently the sand was not exciting enough and the floor looked like a career opportunity.

WATER PARAMETERS

Black Chin Diamond Gobies are generally hardy once established, but they still need clean, stable marine conditions. “Sand-sifter” does not mean “immune to bad water,” despite what optimism and poor planning may suggest.

Temperature: 72-78°F
pH Level: 8.1-8.4
Salinity: 1.020-1.026 specific gravity
Ammonia, Nitrite, and Nitrate: Ammonia and nitrite should remain undetectable. Nitrate should be kept as low as reasonably possible, ideally below 20 ppm.
Water Flow: Low to moderate flow is ideal near the sandbed. Provide enough movement to keep the aquarium oxygenated and help move waste toward filtration, but avoid blasting the sandbed directly unless you enjoy creating an underwater dust storm.

DIET

Black Chin Diamond Gobies are carnivore to omnivore sand-sifters that naturally feed by taking in mouthfuls of sand and filtering out small crustaceans, worms, leftover food, and organic particles. In aquariums, they should be offered a varied diet and not expected to survive only on whatever they find in the sand.

PRIMARY DIET

Frozen Food: Offer mysis shrimp, enriched brine shrimp, marine blends, finely chopped seafood, and other small frozen foods. We at Summit City Coral prefer frozen foods such as LRS Reef Frenzy and PE Mysis.

Prepared Foods: High-quality sinking pellets, small marine pellets, and prepared carnivore or omnivore foods can help provide a balanced diet. Sinking foods are especially useful since this fish feeds near the bottom.

Live Foods: Live brine shrimp, blackworms, copepods, or other small live foods can help encourage feeding, especially in newly introduced or hesitant individuals.

Natural Sifting: Established sandbeds can provide natural grazing and foraging opportunities, but this should be viewed as supplemental. The goby still needs regular feeding, because “it eats from the sand” is not a nutrition plan. It is a sentence people say before learning expensive lessons.

FEEDING FREQUENCY

Feed small amounts 1-2 times per day, or more often if the fish is thin, newly added, or being outcompeted by faster tank mates. Diamond-style gobies may need food delivered closer to the sandbed so they actually get enough before the local wrasse mafia steals everything.

COMPATIBILITY

Black Chin Diamond Gobies are generally peaceful and work well in community reef aquariums. They are usually safe with corals and invertebrates, though their sand-sifting behavior can move substrate around the tank.

COMMON TANK MATES

Fish: Clownfish, cardinalfish, blennies, peaceful wrasses, firefish, tangs, dwarf angelfish, chromis, and other peaceful to semi-peaceful community fish.

Avoid: Aggressive fish that may harass or outcompete them, large predatory fish that may eat them, and other sand-sifting gobies in smaller aquariums unless the tank has enough space and food.

Invertebrates: Usually safe with cleaner shrimp, hermit crabs, snails, urchins, and most common reef invertebrates.

Coral: Black Chin Diamond Gobies are considered reef-safe and should not directly bother soft corals, LPS, SPS, zoanthids, mushrooms, clams, or anemones. However, they may drop sand onto low-placed corals or bury small frags if those frags are placed directly on the sandbed.

BEHAVIORAL NOTES

Temperament: Peaceful overall and usually calm with tank mates.

Sand-Sifting Behavior: Constantly sifts sand through the mouth and gills while searching for food. This can help keep the sandbed cleaner and more oxygenated.

Burrowing: May dig under rocks or create shallow burrows. Make sure rockwork is secure before adding the fish.

Aquascape Disruption: May move sand, create piles, or dust nearby corals. This is normal behavior, not vandalism, though the distinction may feel academic when your frag plug gets buried.

Reef Compatibility: Excellent for most reef tanks, but use care when placing corals directly on the sandbed.

Feeding Risk: Can lose weight if the tank is too new, the sandbed is too sterile, or faster tank mates prevent it from eating enough prepared foods.

Pairing: Can sometimes be kept as a pair, but avoid keeping multiple similar gobies in small aquariums due to possible territorial behavior.

Jumping: A tight-fitting lid is strongly recommended. Gobies are skilled jumpers and have apparently misunderstood the purpose of aquariums.

ACCLIMATION PROCESS

This acclimation method helps reduce stress by gradually introducing the fish to your aquarium’s temperature and water chemistry.

1. TURN OFF THE LIGHTS & ATO

Turn off aquarium lights to reduce stress. If you have an Auto Top Off system, switch it off before starting acclimation.

2. FLOAT THE BAG

Float the sealed bag in the aquarium for 15-20 minutes to allow the temperature in the bag to equalize with the tank.

3. OPEN BAG, ADD FISH TO CONTAINER

Carefully open the bag and transfer the fish and shipping water into a clean bucket or container.

4. ACCLIMATE USING TANK WATER

Add 1/4 cup of tank water to the container every 5 minutes for 40 minutes.

5. TRANSFER FISH TO AQUARIUM

Once acclimation is complete, gently transfer the fish into the aquarium using a net or specimen container. Discard the shipping water. Do not pour shipping water into your aquarium.

6. REFILL THE AQUARIUM WITH SALTWATER

You may need to replace the saltwater removed during acclimation with fresh mixed saltwater.