Tiger pistol shrimp (Alpheus bellulus) care guide

Group
Shrimp
Other names
Tiger snapping shrimp, Symbiosis shrimp, Pistol shrimp, Snapping shrimp
Family
Alpheidae
Origin
Tropical Indo-West Pacific, including Japan; sand, mud and rubble down to about 20 m
Water
saltwater
Maximum size
5 cm
Temperature
22–26°C
pH
8.1–8.4
Hardness
dKH 8–12, SG 1.023–1.025
Care level
beginner
Temperament
peaceful
Reef safe
yes

Care

The tiger pistol shrimp is a stout snapping shrimp from the Indo-West Pacific. It has a yellowish or pale tan body covered with symmetrical patches of brown, purple-brown or rusty orange, banded legs and red antennae, and grows to about 4–5 cm. Its right claw is enlarged into a 'pistol' that snaps shut so fast it fires a bubble whose collapse makes a loud crack and a shock wave strong enough to stun small prey. The sound often startles owners and can be confused with a mantis shrimp, but this shrimp is harmless to tank inhabitants. It is best known for living with a watchman goby. The shrimp, which sees poorly, digs and constantly maintains a burrow that both use; the goby stands guard at the entrance and warns the shrimp of danger, and the shrimp keeps an antenna on the fish at all times. Partner gobies include Cryptocentrus cinctus (yellow watchman), Amblyeleotris and Stonogobiops species. Buying the shrimp and goby together, or adding a suitable goby, makes for a fascinating display. Provide a deep sand bed (at least 5–8 cm, ideally mixed grain sizes and shell rubble) with rock to burrow beneath, and dim, sheltered areas. Make sure rockwork sits on the tank floor, not on the sand, because the shrimp will tunnel under it. It is intolerant of copper and high nitrate and needs correct iodine to moult. It keeps sand turned over and scavenges leftover food. Keep one, or a pair; in pairs one often guards while the other works in the burrow. Copper-based medicines and some plant fertilisers are toxic to shrimp, snails and most invertebrates. Sources: LiveAquaria (liveaquaria.com/products/tiger-snapping-shrimp); Wikipedia (en.wikipedia.org/wiki/Alpheusbellulus). Checked October 2026.

Diet

A carnivorous scavenger. In the wild it eats small invertebrates, plus detritus, algae and carcasses near its burrow, and its partner goby sometimes brings it food. In the aquarium it accepts meaty frozen foods such as mysis and brine shrimp, finely chopped seafood, flakes, pellets and sinking tablets. Target-feed near the burrow entrance if it stays hidden.

Breeding

Our sources do not describe its breeding. Like other snapping shrimp, pairs may form and females carry eggs, but the planktonic larvae are not raised in home aquaria. Sexes cannot easily be told apart.

Compatibility and tank mates

Reef compatible. Ideal with a watchman goby partner. Peaceful towards most fish; it is generally unlikely to attack fish for food, but it may catch very small shrimp and is a risk to tiny bottom-dwellers. Its own predators include larger wrasses, triggers, hawkfish and big crabs. It may move small corals and frags placed on the sand while digging.

Last updated 8 October 2026. Community-edited care guide on Aquatic-Auctions.

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