Randall's Pistol Shrimp care guide
Randall's Pistol Shrimp (Alpheus randalli) — minimum tank 60 L, temperature 24-26 °C, pH 8.1-8.4.
Compiled by Aquairi from published sources · Published · Updated
Overview
Randall's Pistol Shrimp (Alpheus randalli) is a marine pistol (snapping) shrimp of the family Alpheidae, listed in the Aquairi knowledge base as an intermediate-level species. Striking red-and-white striped pistol shrimp that lives in symbiosis with shrimp gobies (e.g. Stonogobiops). Snapping claw produces a loud 'pop' to stun prey.
Taxonomy
- Family: Alpheidae
- Genus: Alpheus
- Scientific name: Alpheus randalli
- Common synonyms: Candy Cane Pistol Shrimp
Habitat
Alpheus pistol (snapping) shrimp are reef and sand-flat alpheids that bear one greatly enlarged claw. Snapping the claw produces a cavitation bubble and a loud pop used to stun prey and deter rivals; many species share a burrow with a partner goby in a well-known symbiosis. In the Aquairi knowledge base this species is recorded from Indo-Pacific.
Tank requirements
- Minimum tank volume: 60 L (15.9 US gal)
- Adult size: 3-5 cm
- Temperature: 24-26 °C (75-79 °F)
- pH: 8.1-8.4
- GH: 8-12 °dGH
- KH: 8-12 °dKH
- Salinity (specific gravity): 1.024-1.026
- Lifespan: 3-5 years
Diet
The species is a scavenger, feeding on detritus, small invertebrates and organic particles collected around its burrow; in aquaria it readily takes sinking pellets and frozen foods.
Compatibility
The Aquairi knowledge base lists this species as peaceful. Suitable tank mates include Shrimp gobies (Stonogobiops, Cryptocentrus). It should be kept away from Predatory fish, Triggerfish. It pairs naturally with a partner goby that shares and guards its burrow.
Breeding
Breeding requires a planktonic larval stage, generally in brackish or marine water, which makes captive reproduction very difficult and rarely achieved in home aquaria.
Breeding Randall's Pistol Shrimp (Alpheus randalli)
Overview
Alpheus randalli is a small pistol shrimp of the Alpheidae, growing to about 3 cm and recorded from the Marquesas Islands and parts of the Indian Ocean including the Seychelles at depths around 18 m. It is best known for its symbiosis with shrimp gobies, in particular Randall's prawn goby (Amblyeleotris randalli).
Sexing
Pistol shrimp have separate sexes. In Alpheidae, breeding pairs are typically monogamous with mate-guarding, and the female is the egg-carrying sex. For A. randalli, individuals are reported to open burrow connections toward a neighbour of the opposite sex when breeding.
Breeding Setup
The shrimp excavates an extensive burrow in sandy or silty substrate that it shares with its goby partner; the burrow has multiple shifting openings, and at night both animals retreat inside and seal the entrances. A deep sand bed and a compatible shrimp goby therefore reproduce the natural social setting.
Spawning & Berried Females
The female shrimp carries her eggs under her abdomen. Within the symbiosis the goby probably lays its own eggs in a mass inside the shared burrow, while the shrimp couples its breeding to an adjoining burrow of the opposite sex.
Larval Care
Across the family, hatched young pass through planktonic larval stages (nauplius and zoea) before reaching a post-larval form. Rearing these tiny planktonic larvae requires graded live foods and stable water, and there is no established hobbyist protocol for A. randalli specifically.
Common Challenges
The cryptic, burrow-bound lifestyle means spawning is rarely observed, and the planktonic larvae are not commonly raised in home systems. Breeding effort is therefore better directed at providing the natural burrow-and-goby environment than at attempting larval culture.