Diamond watchman goby reef compatibility check
Valenciennea puellaris
Diamond watchman goby (Valenciennea puellaris) is an intermediate-level goby that needs at least 50 gallons. It is listed as reef safe; can starve in young tanks without enough sandbed food. Temperament is peaceful and adults reach about 6 inches. ReefCrafter schedules it as middle-stage livestock, with no tank-age gate beyond a finished cycle.
Sand-sifting goby for mature tanks with enough footprint and covered tops.
Who it is for
Good fit for
- ✓ Tanks of 50+ gallons at the animal's adult size.
- ✓ Newly cycled tanks with a compatible stocking list.
- ✓ Reef tanks with corals and invertebrates.
- ✓ Peaceful community tanks.
Not a fit for
- ✕ Tanks under 50 gallons, even while it is small.
- ✕ Keepers without some reef experience and stable parameters.
- ✕ Can starve in young tanks without enough sandbed food.
Compatibility warnings
- Can starve in young tanks without enough sandbed food.
- Known jumper.
- Check adult size against the final tank, not the fish or coral at purchase size.
- Add livestock slowly so the bioload and nutrient export can keep up.
- Use the planner when this animal changes the tank-size, flow, lighting, or stocking plan.
Professional planning context
- Use the 50 gallon minimum as an adult-planning floor; display length, aquascape, and existing tankmates can raise that floor.
- This can be planned early after cycling, but only after quarantine/acclimation logistics and stocking order are settled.
- Professionals should model aggression by territory and introduction order, not only by care level.
Tank fit and maturity gate
ReefCrafter uses 50 gallons as the planning floor for adult size, swimming room, nutrient load, and aggression margin.
This species can be planned early when the tank is cycled and the rest of the stocking list is compatible.
Care notes
- Temperament
- Peaceful
- Reef safety
- Safe
- Adult size
- 6 in
- Placement
- sandbed
- Diet
- Build dependent
- Flow
- Varied
- Light
- None
- Bioload
- 1.4
- Stocking stage
- Middle
Related species
- Engineer goby
55+ gallons, beginner care.
- Yasha goby
20+ gallons.
- Yellow watchman goby
20+ gallons, beginner care.
- Neon goby
10+ gallons, beginner care.
Equipment that fits
- Red Sea MAX NANO G2 XXL Reef System (53 Gal)
53-gallon display, above this animal's 50-gallon floor.
- Red Sea Reefer 250 G2+ System (54 Gal)
54-gallon display, above this animal's 50-gallon floor.
- CADE Pro Reef 600 Series 2
60-gallon display, above this animal's 50-gallon floor.
Related reading
Questions
What size tank does the diamond watchman goby need?
ReefCrafter plans for at least 50 gallons, based on an adult size of about 6 inches, plus swimming room, nutrient load, and aggression margin. Use the adult size, not the size at purchase.
Is the diamond watchman goby reef safe?
It is listed as reef safe in ReefCrafter's catalog. Watch for: Can starve in young tanks without enough sandbed food; Known jumper.
Is the diamond watchman goby good for beginners?
It is rated intermediate care, so most beginners should add it later, after parameters have been stable.
When should I add the diamond watchman goby to my tank?
ReefCrafter treats it as middle-stage livestock, with no tank-age gate beyond a finished cycle. Add livestock slowly so nutrient export keeps up.