Ocellaris clownfish pair reef compatibility check
Amphiprion ocellaris
Ocellaris clownfish pair (Amphiprion ocellaris) is a beginner-level clownfish that needs at least 20 gallons. It is listed as reef safe; plan the pair early because a bonded pair can defend a corner. Temperament is territorial and adults reach about 3.5 inches.
A classic first stocking plan when the tank is at least 20 gallons and future additions are peaceful.
Who it is for
Good fit for
- ✓ Tanks of 20+ gallons at the animal's adult size.
- ✓ Beginners following a slow, planned stocking order.
- ✓ Newly cycled tanks with a compatible stocking list.
- ✓ Reef tanks with corals and invertebrates.
Not a fit for
- ✕ Tanks under 20 gallons, even while it is small.
- ✕ Plan the pair early because a bonded pair can defend a corner.
Compatibility warnings
- Plan the pair early because a bonded pair can defend a corner.
- 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 20 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 20 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
- Territorial
- Reef safety
- Safe
- Adult size
- 3.5 in
- Placement
- Build dependent
- Diet
- Build dependent
- Flow
- Varied
- Light
- None
- Bioload
- 2.6
- Stocking stage
- Middle
Related species
- Black ocellaris clownfish
Same 20-gallon floor.
- Ocellaris clownfish
Same 20-gallon floor.
- Percula clownfish
Same 20-gallon floor.
- Pink streaked wrasse
Same 20-gallon floor.
Equipment that fits
- Red Sea MAX NANO G2 Cube Reef System (20 Gal)
20-gallon display, above this animal's 20-gallon floor.
- Waterbox Cube 20 Nano AIO Aquarium
20-gallon display, above this animal's 20-gallon floor.
- Fiji Cube 22.4 Gallon Rimless AIO Nano Aquarium PRO Series
22-gallon display, above this animal's 20-gallon floor.
Related reading
Questions
What size tank does the ocellaris clownfish pair need?
ReefCrafter plans for at least 20 gallons, based on an adult size of about 3.5 inches, plus swimming room, nutrient load, and aggression margin. Use the adult size, not the size at purchase.
Is the ocellaris clownfish pair reef safe?
It is listed as reef safe in ReefCrafter's catalog. Watch for: Plan the pair early because a bonded pair can defend a corner.
Is the ocellaris clownfish pair good for beginners?
Yes. It is rated beginner care.
When should I add the ocellaris clownfish pair 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.