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Yellow watchman goby (Cryptocentrus cinctus)
Photo: User:Haplochromis · CC BY-SA 3.0 via Wikimedia Commons

Yellow watchman goby

Cryptocentrus cinctus · Gobiidae

Also known as Yellow prawn goby

Beginner

Sifts sand from a burrow and often pairs with a pistol shrimp — the best sand-bed character fish.

In short: A yellow watchman goby needs at least 75 L (20 US gal), water at 23–27 °C (73–81 °F) and pH 8.1–8.4. It is peaceful, usually kept singly, and rated beginner to keep.

Updated

Minimum tank
75 L (20 US gal)
Temperature
23–27 °C (73–81 °F)
pH
8.1–8.4
Adult size
9 cm (3.5 in)
Group size
1+

Reef & marine husbandry

Specific gravity
1.023–1.026
Reef safety
Reef safe
With corals
Reef safe.
With inverts
Pairs with pistol shrimp; safe with others.
Minimum in a mixed reef
75 L (20 US gal)
Minimum fish-only (FOWLR)
75 L (20 US gal)
Aggression
Only defends its burrow.
Feeding
Twice daily near the sand.

Care requirements

Minimum tank volume
75 L (20 US gal)
Temperature
23–27 °C (73–81 °F)
pH
8.1–8.4
Hardness
8–12 dGH
Lifespan
4–8 years
Diet
Carnivore — mysis, brine, sinking pellets.
Care level
Beginner

Origin & habitat

Native region
Western Pacific
Water type
Saltwater
Biotope
Sandy reef margins with shrimp burrows
Natural conditions
Deep sand bed, moderate flow.

Behaviour & stocking

Temperament
Peaceful
Minimum group
1 fish
Swims
Bottom
Good tank mates
Pistol shrimp
Clownfish
Firefish
Chromis
Avoid
Other burrowing gobies
Aggressive dottybacks

Breeding & difficulty

Breeding difficulty
Advanced
Sexing
Males are slightly larger.
Notes
Rarely bred at home.
Common ailments
Marine ich
Starvation in bare-bottom tanks
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