QUICK STATS

Care Level: Easy
Diet: Carnivore
Temperament: Peaceful, Territorial With Its Own Kind
Reef-Safe: Yes
Venomous/Toxic: No
Approximate Purchase Size: 0.75-1.5"
Approximate Max Size: Around 1.5-2"
Recommended Tank Size: 10 Gallons or Larger

RED HEAD GOBY

The Red Head Goby (Elacatinus puncticulatus), also called the Redhead Goby, is a tiny reef-safe goby known for its red to orange head markings, pale body, dark spotting, and small perching behavior. It stays very small, making it a great option for nano reefs, peaceful community aquariums, and customers who want personality without adding a fish that will eventually require a second mortgage in tank space.

Red Head Gobies are peaceful, hardy once established, and usually easy to feed in aquarium conditions. They spend much of their time perched on rockwork, hovering near small caves, or moving through the aquascape while picking at tiny foods. Despite their small size, they are often visible and active once comfortable, which is nice because buying a fish just to never see it is one of this hobby’s many little emotional tax scams.

This species may show cleaner behavior and occasionally pick parasites, mucus, or dead tissue from larger fish. However, it is not an obligate cleaner and should still be fed a normal varied diet. It is generally reef-safe and should not bother corals or common invertebrates.

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

AQUARIUM REQUIREMENTS

AQUARIUM SIZE

A minimum tank size of 10 gallons or larger is recommended for a single Red Head Goby. Because this fish stays very small and does not require large open swimming areas, it can do well in nano aquariums when water quality is stable.

For pairs or community tanks, 20 gallons or larger is preferred. Larger aquariums provide better stability, more hiding areas, and more space if territorial behavior occurs between similar gobies.

HABITAT RECOMMENDATIONS

Red Head Gobies do best in established aquariums with live rock, peaceful tank mates, and secure hiding places.

Aquascaping: Provide live rock, caves, ledges, and crevices. These gobies often perch on rockwork, hover near shelter, and claim small areas of the aquarium like they have filed paperwork with the reef zoning board.

Substrate: Sand, fine aragonite, crushed coral, or bare-bottom systems can all work. This species does not rely heavily on the sandbed.

Rockwork: Live rock is strongly recommended. It provides shelter, territory, biological filtration, and natural surfaces for perching and foraging.

Cleaning Stations: Red Head Gobies may display cleaner behavior and interact with larger fish, though not every individual will do this consistently. Cleaning behavior should be viewed as a bonus, not the entire job description.

Tank Cover: A tight-fitting lid is recommended. Small gobies can jump or find their way into overflow areas, because apparently being tiny also comes with terrible navigation software.

WATER PARAMETERS

Red Head Gobies are hardy once established, but they still need clean, stable marine conditions. “Nano fish” does not mean “immune to nano tank chaos,” though small aquariums continue trying to make that everyone’s problem.

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. Provide enough movement to keep the aquarium oxygenated and move waste toward filtration, while still allowing calmer areas for perching and resting.

DIET

Red Head Gobies are carnivores that naturally feed on tiny meaty foods, small crustaceans, zooplankton, and sometimes parasites or mucus from larger fish. In aquariums, they should be offered a varied diet and should not be expected to survive only by cleaning tank mates.

PRIMARY DIET

Frozen Food: Offer enriched brine shrimp, cyclops, finely chopped mysis shrimp, small marine blends, and other tiny frozen foods. We at Summit City Coral prefer frozen foods such as LRS Reef Frenzy and PE Mysis, chopped or broken down as needed for smaller gobies.

Prepared Foods: High-quality small marine pellets, flakes, and prepared carnivore foods can help provide balanced nutrition once the fish is eating reliably. Very small pellet sizes are best.

Live Foods: Copepods, amphipods, live brine shrimp, and other small live foods can help encourage feeding, especially in newly introduced or shy individuals.

Cleaner Behavior: This goby may pick parasites, mucus, or dead tissue from larger fish, but cleaning should be viewed as natural behavior, not the complete feeding plan. Fish are not healthcare providers, although this one does have suspiciously good bedside manner.

FEEDING FREQUENCY

Feed small amounts 1-2 times per day. In community tanks, make sure food reaches the Red Head Goby before faster fish inhale everything like aquatic debt collectors.

COMPATIBILITY

Red Head Gobies are peaceful and work well in nano reefs, peaceful community aquariums, and larger reef tanks. They are best housed with calm tank mates that will not bully or eat them.

COMMON TANK MATES

Fish: Small clownfish, cardinalfish, firefish, peaceful gobies, blennies, small wrasses, chromis, dwarf angelfish, and other peaceful to semi-peaceful reef fish.

Avoid: Large predatory fish, aggressive dottybacks, aggressive damsels, triggers, groupers, lionfish, hawkfish large enough to eat them, and any fish likely to view them as a tiny spotted snack.

Same Species: May be territorial toward other Red Head Gobies unless kept as a bonded pair. Multiple individuals should only be kept in larger aquariums with enough space, shelter, and territory.

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

Coral: Red Head Gobies are considered reef-safe and should not bother soft corals, LPS, SPS, zoanthids, mushrooms, clams, or anemones.

BEHAVIORAL NOTES

Temperament: Peaceful overall, though it may defend a small territory from similar gobies.

Cleaner Behavior: May clean larger fish by picking at parasites, mucus, or dead tissue. This behavior is natural, but not guaranteed in every aquarium.

Nano Reef Suitability: Excellent choice for smaller reef aquariums due to its tiny size, peaceful nature, and low space requirements.

Reef Compatibility: Excellent for reef tanks. They generally ignore coral and invertebrates.

Visibility: Often visible once settled, especially if housed with peaceful tank mates. Some individuals may choose a favorite perch or small territory.

Pairing: Can sometimes be kept as a bonded pair. Avoid mixing multiple individuals randomly in small tanks due to territorial behavior.

Captive Breeding: Red Head Gobies have been known to reproduce in aquariums and may lay eggs in crevices or shells when conditions are suitable.

Feeding Risk: Very small individuals can be outcompeted by faster fish. Make sure they are eating well, especially during the first few days after introduction.

Overflow Risk: Because of their small size, they may end up in overflow boxes or filtration areas if openings are not protected.

Jumping: A tight-fitting lid is recommended. Tiny gobies are fully capable of making dramatic little launch decisions.

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.