Pistol Shrimp

The Pistol Shrimp (Alpheus heterochaelis) is a fascinating and hardworking invertebrate best known for its snapping claw and burrowing behavior. Typically tan to light brown with subtle patterning that helps it blend into the sand, this shrimp adds both function and personality to a saltwater aquarium. Its signature “snap” is created by a specialized claw that produces a sharp popping sound, making it one of the most interesting creatures in the hobby.

Native to shallow coastal waters of the western Atlantic and Caribbean, the Pistol Shrimp spends most of its time digging and maintaining a burrow beneath rocks or within the sand bed. In the aquarium, it thrives in setups with fine sand and stable rockwork. It is especially popular for its symbiotic relationship with certain gobies, where the shrimp provides shelter while the goby acts as a lookout.

The Pistol Shrimp is reef safe and will not bother corals. However, its constant digging may shift sand and small rocks, so secure aquascaping is important. It is generally peaceful but may prey on very small shrimp or micro-invertebrates if they wander too close to its burrow.

This species is an opportunistic feeder and will accept a wide variety of foods, including frozen mysis shrimp, brine shrimp, chopped seafood, and sinking pellets. Once established, it is hardy and well suited for both reef and sand-bed focused aquariums.

Quick Facts:

Care Level: Easy to Moderate
Temperament: Peaceful
Maximum Size: ~2 inches
Minimum Tank Size: 20 gallons
Diet: Omnivore (meaty frozen foods and prepared sinking foods)
Reef Safe: Yes

If you’re looking to add a unique, interactive invertebrate that brings natural behavior and utility to your aquarium, the Pistol Shrimp is an excellent and entertaining choice.