Randall's Pistol Shrimp

• ExerciseModerate

  An active swimmer that appreciates open swimming space.

• GroomingRoutine tank care

  Weekly partial water changes keep them in top shape.

• Living spaceNano-tank friendly

  Happy in a small, stable, well-filtered tank.

• Owner experienceSome experience helps

  A little know-how makes life smoother.

• Commitment3–5 years

  Plan for a long, loving relationship.

Health to watch: Molting issues · Nutritional deficiency · Parasites

Randall's Pistol Shrimp (Alpheus randalli) is an Indo-Pacific species of about 4 to 5 cm, banded in red and white with one enlarged snapping claw. That claw closes fast enough to create a cavitation bubble whose collapse produces a sharp crack, used to stun prey and warn intruders. Its eyesight is very poor, which is the basis of its famous partnership with watchman gobies. Provide a 75 litre or larger tank with a sand bed at least 7 cm deep plus rubble and small rocks it can use to shore up tunnels, at 24-27C, salinity 1.024-1.026, pH 8.1-8.4, with no copper medications. It is largely self-feeding on detritus and leftovers but appreciates sinking pellets and chopped seafood delivered near the burrow. Pair it with a compatible watchman goby, ideally introduced at the same time. Two honest notes: the snapping is audible and constant, and the shrimp will rearrange the aquascape, so avoid balancing rock structures on the sand where undermining could topple them.

• How active is a Randall's Pistol Shrimp?

  Moderate. An active swimmer that appreciates open swimming space.

• How much maintenance does a Randall's Pistol Shrimp need?

  Routine tank care. Weekly partial water changes keep them in top shape.

• What tank size does a Randall's Pistol Shrimp need?

  Nano-tank friendly. Happy in a small, stable, well-filtered tank.

• Is a Randall's Pistol Shrimp a good fit for first-time owners?

  Some experience helps. A little know-how makes life smoother.

• How long do Randall's Pistol Shrimp live?

  3–5 years. Plan for a long, loving relationship.

• What health issues affect the Randall's Pistol Shrimp?

  Keep an eye out for Molting issues, Nutritional deficiency, Parasites. These are worth raising with your vet, along with any screening they recommend.

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