Randall’s Prawn Goby (Amblyeleotris randalli) saltwater aquarium fish

Randall's Prawn Goby (Amblyeleotris randalli) is a slender, sand-dwelling goby with a pale white body crossed by a series of orange bars and a tall, sail-like first dorsal fin marked with a dark spot. That elongated fin is raised as a signal flag when the fish perches at the mouth of its burrow, making this one of the more visually striking members of the genus. The species occurs across the Indo-Pacific, with records from Indonesia and the western Pacific through the Philippines, Micronesia, Australia, the Maldives, and the Red Sea. Adults reach roughly 4 inches.

In the wild, this goby occupies sand and rubble flats adjacent to reef slopes and drop-offs, sheltering in burrows that are frequently excavated and maintained by pistol shrimp. Adult housing should begin at 30 gallons and emphasize open substrate over dense rockwork. A deep bed of sand mixed with shell fragments and small coral rubble allows proper digging, and the burrow itself needs enough room to exceed the length of the fish by at least an inch and a half. Rock arranged to leave protected cavities at the sand line gives additional shelter options.

Ample hiding places matter, since specimens kept in bare tanks without cover tend to remain stressed and reclusive. Open sand for perching and short darting movements should be balanced against secure retreats. A tight-fitting lid is not optional; this species jumps readily, particularly when startled or when establishing territory. Avoid combining it with other dedicated sand-digging fish, such as burrowing wrasses, unless the footprint is generous enough that burrow sites do not overlap.

This is a carnivore that feeds on small invertebrate prey taken from the sand and water column near its burrow. In the aquarium, offer a high-protein, varied menu built around small meaty items: live or frozen brine shrimp, mysis shrimp, and finely chopped seafood. Sinking shrimp pellets are readily taken once the fish is settled, and many individuals will also accept flake or pellet preparations formulated for carnivores.

Feed small portions several times per day. Frequent feeding is especially important for newly introduced specimens, which may be hesitant to leave the burrow and can be outcompeted by faster tankmates. Once the goby is established in a mature system with a productive sand bed, it will begin finding natural prey on its own, and feeding frequency can be reduced accordingly.

Frozen Mysis Shrimp Live Brine Shrimp Frozen Brine Shrimp Chopped Seafood Sinking Shrimp Pellets Carnivore Pellets Carnivore Flake
Randall's Prawn Goby is territorial and defends its burrow with conviction, showing aggression toward other bottom-dwelling fish and toward anything that approaches the entrance too closely. Away from that defended zone it is typically unobtrusive and coexists well with small, non-aggressive fish. Keep it singly or as a mated pair; multiple unpaired individuals need substantially more space and separated burrow sites. Avoid housing it with aggressive predators such as triggerfish or basses, which will intimidate it into permanent hiding.

The most rewarding pairing is with a pistol shrimp of the genus Alpheus, including Alpheus randalli, A. bellulus, or A. ochrostriatus. The shrimp excavates and maintains the tunnel while the goby stands sentry at the entrance, keeping antenna contact with its partner. The relationship is facultative rather than obligatory, so the goby does not require a shrimp provided it has adequate cover. It poses no threat to corals and is considered reef safe, but small ornamental shrimp and other tiny invertebrates may be viewed as food, so stock delicate micro-crustaceans with that in mind.

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FAQ

Frequently Asked Questions

About the Randall’s Prawn Goby

  • Does Randall's Prawn Goby need a pistol shrimp to thrive?
    No, the partnership is facultative rather than obligatory, so the goby does well on its own as long as it has a deep sand bed and plenty of shelter. It does display its most interesting behavior when paired with an Alpheus pistol shrimp.
  • Is this goby safe with shrimp and small invertebrates in a reef tank?
    It does not harm corals and is considered reef safe, but it may prey on small ornamental shrimp and other tiny invertebrates. Use caution when stocking delicate micro-crustaceans alongside it.
  • What kind of substrate and lid does this species require?
    Provide a deep bed of sand mixed with shell fragments and coral rubble so it can excavate a burrow longer than its own body, plus additional rock cavities for shelter. A tight-fitting lid is essential, as this goby is a capable jumper.