How deep should the sand bed be for a Randall’s Prawn Goby, and what grain size is best if I want it to pair with a pistol shrimp?

Aim for a 2–3 inch sand bed using mostly fine aragonite (0.5–1 mm) with some larger grains mixed in. Fine sand allows a pistol shrimp (such as Alpheus randalli or A. bellulus) to dig stable burrows, while a bit of coarser material (1–2 mm) helps prevent cave collapse. Avoid very coarse crushed coral as it’s hard for the shrimp to move and can cause unstable tunnels.

My Randall’s Prawn Goby spends most of the day hidden in its burrow and only peeks out. Is this normal, and what can I change in the aquascape to make it more visible?

This behavior is normal, especially in bright or busy tanks. To encourage more visible activity, build rockwork that forms “overhangs” and caves right against the front glass, then slope sand up against these structures so the shrimp can place burrow entrances where you can see them. Provide several burrow “starter” spots (small rock piles on the sand) in open areas. Keeping lighting slightly dimmer and maintaining a peaceful tank with few boisterous fish will also help the goby feel secure enough to sit farther out of the burrow.

Can Randall’s Prawn Gobies be kept in groups or pairs, and how can I increase the chance of forming a compatible pair in a home aquarium?

In small tanks, keep a single individual; in larger systems (4 feet or longer with many burrow sites), you may keep a pair, but random groups tend to fight. The species is not easy to sex by eye, so pairing is trial and error. The safest approach is to introduce 3–4 small juveniles at once into a larger, rock-filled tank, then let a pair form naturally and remove any individuals that are being chased or excluded from burrows. Introduce all gobies at the same time to reduce territorial disputes, and provide multiple separated sand zones so subdominant fish can settle elsewhere until you identify a stable pair.

My Randall’s Prawn Goby is eating, but its belly looks pinched and it’s getting thinner. What specific feeding strategy and foods work best for this species?

Feed small, frequent meals—2 to 3 times per day—directly near its burrow, because this fish is a cautious feeder. Use a turkey baster or feeding pipette to deliver finely chopped meaty foods like mysis shrimp, enriched brine shrimp, finely chopped clam or shrimp, and high-quality nano pellets that sink slowly. Soak foods in a vitamin supplement occasionally to support health. If tankmates are fast feeders, distract them with food at one side of the tank while you target-feed the goby at its burrow entrance so it gets its share.

Will a Randall’s Prawn Goby jump out of the tank, and are there specific conditions that make jumping more likely for this species?

Randall’s Prawn Gobies are capable jumpers, especially when newly introduced, startled at night, or chased by tankmates. Any gap in the lid, overflow, or back section of the tank can be an escape route. A tight-fitting lid or mesh screen with openings no larger than about 1/4 inch is essential. Jump risk is highest during the first couple of weeks, so dim the lights when introducing the fish, avoid sudden movements near the tank, and ensure it has burrow options in quieter areas of the aquascape so it feels secure and is less likely to bolt upward when spooked.

Randall’s Prawn Goby

Amblyeleotris randalli

Goby Reef Safe Carnivore Burrower

Care Level

Easy

Temperament

Peaceful

Reef Safe

Yes

Max Size

4 inches

Min Tank

30 gallons

Origin

Indonesia

Quick Diet

Carnivore

Food

Pellets, Mysis, Finely Chopped Seafood

Overview:
Randall’s Prawn Goby, also known as Amblyeleotris randalli, is a small, colorful marine fish that thrives in a well-maintained saltwater aquarium. Ideal habitat conditions for this species include a tank size of at least 20 gallons with plenty of live rock and a sandy substrate to mimic their natural environment. They prefer stable water parameters with a temperature range of 72-78°F, pH between 8.1-8.4, and specific gravity of 1.020-1.025. Providing ample hiding spots and burrow opportunities is crucial, as they form symbiotic relationships with pistol shrimp, sharing burrows for protection.

Compatibility:
Randall’s Prawn Goby is generally peaceful and can coexist with a variety of tankmates. They are best suited for community tanks with other non-aggressive species. Ideal companions include other small gobies, blennies, and reef-safe fish. Avoid housing them with large or aggressive fish that may view them as prey. Their symbiotic relationship with pistol shrimp makes them an excellent addition to a reef tank, as they will often share burrows and work together for mutual protection. Ensure adequate space and hiding spots to minimize territorial disputes.

Health and Quarantine:
Maintaining the health of Randall’s Prawn Goby involves regular monitoring of water quality and ensuring a stress-free environment. Quarantine new additions for at least two weeks to prevent the introduction of diseases. Common health issues include parasitic infections like ich and bacterial infections. Regularly check for signs of stress or illness, such as changes in color, appetite, or behavior. Implement a routine of partial water changes, and maintain proper filtration to prevent the buildup of toxins. Providing a balanced diet and stable environment will help bolster their immune system and promote longevity.

Pellets Mysis Finely Chopped Seafood

Randall’s Prawn Goby exhibits a symbiotic relationship with pistol shrimp, sharing burrows and communicating via body movements. It hovers near the burrow entrance, retreating quickly when threatened. Generally peaceful, it coexists well with non-aggressive species but may become territorial in cramped conditions. It prefers sandy substrates for burrow construction and should be paired with a pistol shrimp for optimal behavior. Avoid housing with large, predatory fish to prevent stress and potential predation.

Recommended Products

Premium Fish Food - Pellets - Reef Genetics

$11.99

TDO-C2 Chroma BOOST Fish Food - Reef Nutrition

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FAQ

Frequently Asked Questions

About the Randall’s Prawn Goby

How deep should the sand bed be for a Randall’s Prawn Goby, and what grain size is best if I want it to pair with a pistol shrimp?

Aim for a 2–3 inch sand bed using mostly fine aragonite (0.5–1 mm) with some larger grains mixed in. Fine sand allows a pistol shrimp (such as Alpheus randalli or A. bellulus) to dig stable burrows, while a bit of coarser material (1–2 mm) helps prevent cave collapse. Avoid very coarse crushed coral as it’s hard for the shrimp to move and can cause unstable tunnels.
My Randall’s Prawn Goby spends most of the day hidden in its burrow and only peeks out. Is this normal, and what can I change in the aquascape to make it more visible?

This behavior is normal, especially in bright or busy tanks. To encourage more visible activity, build rockwork that forms “overhangs” and caves right against the front glass, then slope sand up against these structures so the shrimp can place burrow entrances where you can see them. Provide several burrow “starter” spots (small rock piles on the sand) in open areas. Keeping lighting slightly dimmer and maintaining a peaceful tank with few boisterous fish will also help the goby feel secure enough to sit farther out of the burrow.
Can Randall’s Prawn Gobies be kept in groups or pairs, and how can I increase the chance of forming a compatible pair in a home aquarium?

In small tanks, keep a single individual; in larger systems (4 feet or longer with many burrow sites), you may keep a pair, but random groups tend to fight. The species is not easy to sex by eye, so pairing is trial and error. The safest approach is to introduce 3–4 small juveniles at once into a larger, rock-filled tank, then let a pair form naturally and remove any individuals that are being chased or excluded from burrows. Introduce all gobies at the same time to reduce territorial disputes, and provide multiple separated sand zones so subdominant fish can settle elsewhere until you identify a stable pair.
My Randall’s Prawn Goby is eating, but its belly looks pinched and it’s getting thinner. What specific feeding strategy and foods work best for this species?

Feed small, frequent meals—2 to 3 times per day—directly near its burrow, because this fish is a cautious feeder. Use a turkey baster or feeding pipette to deliver finely chopped meaty foods like mysis shrimp, enriched brine shrimp, finely chopped clam or shrimp, and high-quality nano pellets that sink slowly. Soak foods in a vitamin supplement occasionally to support health. If tankmates are fast feeders, distract them with food at one side of the tank while you target-feed the goby at its burrow entrance so it gets its share.
Will a Randall’s Prawn Goby jump out of the tank, and are there specific conditions that make jumping more likely for this species?

Randall’s Prawn Gobies are capable jumpers, especially when newly introduced, startled at night, or chased by tankmates. Any gap in the lid, overflow, or back section of the tank can be an escape route. A tight-fitting lid or mesh screen with openings no larger than about 1/4 inch is essential. Jump risk is highest during the first couple of weeks, so dim the lights when introducing the fish, avoid sudden movements near the tank, and ensure it has burrow options in quieter areas of the aquascape so it feels secure and is less likely to bolt upward when spooked.

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