Alpheus bellulus M Tiger Pistol Shrimp (Alpheus bellulus)

Overview

Alpheus bellulus, commonly sold as the Tiger Pistol Shrimp, is a fascinating marine invertebrate prized for its bold patterning, burrowing habits and remarkable symbiotic behaviour with gobies. The “pistol” name comes from the oversized claw, which can snap shut with incredible speed to create a loud click and a tiny shockwave used for defence and hunting. This makes it one of the most interesting shrimp species available to reef keepers.

Our M size Tiger Pistol Shrimp is a great choice for aquarists looking to add natural behaviour and movement to a marine setup. It is best kept in a mature saltwater aquarium with plenty of sand and hiding places, ideally alongside a compatible goby species. With the right environment, this shrimp will spend much of its time excavating and maintaining a burrow, creating a lively and engaging display.

As with all live livestock, we recommend ordering when you are ready to receive your animal. We offer fast UK delivery and a live arrival guarantee for added peace of mind.

Care at a Glance

Origin & Natural Habitat

Alpheus bellulus is native to the Indo-Pacific region, where it inhabits shallow coastal waters, sandy lagoons and rubble zones. In the wild, pistol shrimp are expert burrowers, using sand and shell fragments to build secure tunnels and chambers. They often live in close association with gobies, which act as lookouts while the shrimp maintains the burrow.

This natural lifestyle is important to replicate in the aquarium. A suitable substrate and stable rockwork allow the shrimp to behave naturally, reducing stress and encouraging the fascinating digging and tunnel-building activity that makes this species so popular.

Tank Setup & Water Parameters

For best results, keep Tiger Pistol Shrimp in a mature marine aquarium with stable water conditions and a fine sand bed. A depth of at least 5–7 cm of sand is recommended, with additional rubble or small shell pieces to help support burrow construction. Live rock should be arranged securely so that burrowing does not destabilise the aquascape.

Because this species is small and secretive, it is best housed in a tank with low to moderate flow and plenty of shelter. A tight-fitting lid is not usually essential for shrimp alone, but good aquarium husbandry is vital: maintain strong filtration, regular water changes and consistent salinity. Avoid sudden changes in temperature or salinity, as invertebrates can be sensitive to rapid shifts.

Ideal water conditions are:

• Temperature: 22–26°C
• pH: 8.1–8.4
• Specific gravity: around 1.023–1.026
• Ammonia/Nitrite: 0

Like other crustaceans, Alpheus bellulus requires iodine and trace elements in appropriate levels for healthy moulting. Do not house with aggressive fish that may harass or eat it, and ensure there are multiple hiding places if keeping more than one shrimp in a larger system.

Feeding Guide

Tiger Pistol Shrimp are opportunistic omnivores and scavengers. In the aquarium they will feed on leftover meaty foods, detritus and small invertebrate foods, but they should not be expected to survive on leftovers alone. Offer a varied diet including finely chopped marine foods, frozen mysis, enriched brine shrimp, quality sinking pellets and occasional algae-based foods.

Feed small amounts once or twice daily, taking care not to overfeed. Because this shrimp often remains hidden in its burrow, target feeding near the entrance can help ensure it gets enough nutrition. A healthy pistol shrimp will be active around its burrow and may carry food items back inside.

Tank Mates / Compatibility

The best companions for Alpheus bellulus are peaceful reef fish that will not prey on it or disturb its burrow. The classic pairing is with a compatible goby, such as a watchman goby or other symbiotic goby species, where both animals benefit from the partnership. Small, non-aggressive fish and many reef-safe invertebrates are usually suitable.

Avoid housing with predatory wrasses, hawkfish, large dottybacks, triggers, puffers and other fish that may attack or eat the shrimp. Very boisterous tank mates can also cause stress and prevent natural burrowing behaviour. If keeping with other shrimp, ensure the aquarium is large enough and that each animal has its own territory.

When introduced to a suitable aquarium, this species quickly becomes one of the most entertaining inhabitants, offering constant natural behaviour and a unique glimpse into marine symbiosis.

Why Buy from Tropical Fish Co

At Tropical Fish Co, we carefully source quality marine livestock and pack every order with animal welfare in mind. Our live stock is selected for health and vitality, and we aim to provide a smooth, reliable experience from checkout to delivery. With fast UK delivery and our live arrival guarantee, you can order with confidence.

We also provide clear care information to help you prepare the right environment before your shrimp arrives. Whether you are building a reef display or planning a goby-and-shrimp partnership, Alpheus bellulus is a superb choice for aquarists who enjoy natural behaviour, personality and a truly distinctive marine species.