What size tank does a Clown Killifish need?

Clown Killifish needs a minimum of 5 gallons, with 8 gallons recommended. They are top swimmers. Keep in groups of 4+.

Is Clown Killifish good for beginners?

Clown Killifish is rated "intermediate" difficulty (2/5). Great for beginners.

What fish are compatible with Clown Killifish?

Clown Killifish is peaceful. Compatible tank mates include other peaceful fish with similar water parameters (pH 6-7, temp 72-79°F).

Clown Killifish

Epiplatys annulatus

Family: Nothobranchiidae • Origin: Various

Clown Killifish (Epiplatys annulatus) is a peaceful killifish reaching 1.5 inches. Keep in groups of 4+. Minimum tank size: 5 gallons.

Min Tank

5 gal

Max Size

1.5"

Temperature

72-79°F

6-7

Lifespan

2 years

School Size

Swim Level

top

Hardness

5-15 dGH

peacefulintermediatecarnivoreschooling

Is Clown Killifish Right for Your Tank?

Clown Killifish is an excellent choice for beginners — rated "intermediate" difficulty (2/5). They're hardy, forgiving of minor water parameter fluctuations, and generally easy to feed. At just 5 gallons minimum, they work well in nano tanks and smaller setups.

With a peaceful temperament, Clown Killifish makes a great community fish. They coexist well with other non-aggressive species of similar size. This is a schooling species — keep at least 4 together, or they may become stressed and display abnormal behavior. Expected lifespan: 2 years with proper care.

Common Mistakes with Clown Killifish

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Keeping fewer than 4 together

Clown Killifish is a schooling species — they need a group of at least 4 to feel secure. Lone or paired individuals become stressed, hide constantly, and may develop health issues or aggression.

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Putting them in a tank under 5 gallons

While 5 gallons is the minimum, nano tanks require more frequent water changes and leave less room for error. A slightly larger tank (8 gal) is much more forgiving.