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Yellow Watchman Goby & Shrimp Pair (Cryptocentrus cinctus & Alpheus sp. (paired combination))

Yellow Watchman Goby & Shrimp Pair

Cryptocentrus cinctus & Alpheus sp. (paired combination)
Family
Goby
Care level
Beginner
Temperament
Peaceful
Reef safe
Reef safe
Max size
8 cm
Min tank
100 L · 26 gal
Origin
Indo-Pacific
Diet
Carnivore
Food
Mysis, Brine shrimp, Marine pellets, Frozen carnivore blends

Overview

This listing pairs a Yellow Watchman Goby with a compatible pistol shrimp (typically an Alpheus species), offering the classic goby-shrimp symbiotic relationship ready to establish in a new tank. The shrimp digs and maintains a shared burrow while the nearly blind shrimp relies on the goby's tail-flick warning signals to know when to retreat from danger.

Both animals benefit from this arrangement, and watching the partnership develop — the shrimp constantly maintaining the burrow entrance while the goby stands guard — is one of the more genuinely interesting behavioural displays available in a reef tank.

This pairing is ideal for keepers wanting to observe natural symbiotic behaviour without needing to source and introduce the goby and shrimp separately and hope they pair up on their own.

Compatibility

Both the goby and shrimp in this pairing are entirely peaceful and reef safe, posing no risk to corals or other invertebrates. They are not aggressive toward other fish, though the goby can occasionally be nipped or bullied by more boisterous tankmates, so avoid aggressive damsels or triggers in a small tank.

The pair should be introduced to the tank together or in close succession to encourage bonding, ideally into a tank with a fine sand bed for the shrimp to burrow into.

Health & quarantine

Both animals are generally hardy, though the goby can jump if startled, so a secure lid is important, and the pistol shrimp should be acclimated carefully given its sensitivity to rapid salinity or temperature changes. A standard quarantine period of two to four weeks for the goby is recommended, with a slow drip acclimation for the shrimp.

Frequently asked questions

Will the goby and shrimp definitely pair up?
Pairing is generally reliable when introduced together or in close succession, though individual bonding can take a few days to establish.
What sand bed does the pistol shrimp need?
A fine to medium sand bed at least a few centimetres deep for burrowing and tunnel maintenance.
Is this pairing reef safe?
Yes, both the goby and the shrimp are fully reef safe with corals and other invertebrates.
Can the pistol shrimp harm my other fish?
No, pistol shrimp of this type are not aggressive toward fish and use their snapping claw defensively or to maintain the burrow.
What tank size suits this pair?
As small as 100 litres works well given the small size of both animals.

Care guidance is drawn from our own experience — every fish is an individual, so treat it as a starting point, not a guarantee. Not sure if a species suits your tank? Come ask us in store. New to the terms? Read the care-terms glossary.