Clown Killifish

Epiplatys annulatus

Clown Killifish (Epiplatys annulatus) — Easy care, Semi-aggressive, under Livebearer & Killifish. Minimum tank in the app: 14.5 US gal min; aim for 68–79°F and pH 6.8–8.2. Clown Killifish are a vibrant addition for aquarists who appreciate small, active fish with engaging behaviors.

Clown Killifish (Epiplatys annulatus) in a planted freshwater aquarium
Care levelEasy
TemperamentSemi-aggressive
Min tank size14.5 US gal min
pH range6.8–8.2
Temperature68–79°F
Max size1.4 in (3.5 cm)
Captive lifespan2–4 years
SchoolingYes · 6+ recommended

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.

Natural distribution

Americas / Africa (varies)

  • Africa
  • South America
  • Central America & Mexico

Regional colours match the stocking calculator’s origin map.

Clown Killifish Tank Setup

Create a structured tank with ample floating plants and cover to mimic their natural habitat, ensuring plenty of open swimming space at the top and mid-levels. A gentle flow and soft substrate will promote comfort, while subdued lighting can help reduce stress and enhance their colors.

What Do Clown Killifishs Eat?

They feed quickly and can compete for food, so provide small, varied diets that cater to their omnivorous nature. Monitor feeding to ensure all fish receive adequate nutrition, as poor diet can affect their health and vibrancy.

Clown Killifish Tank Mates

Ideal companions include other small, peaceful species that occupy different swimming zones, such as tetras or rasboras. Avoid larger or overly aggressive tank mates that may intimidate them. Intraspecies, maintain shoals of at least six to minimize stress and establish a stable social structure.

Are Clown Killifishs Good for Beginners?

In App-aquatic we file this under easy care. That still means a cycled tank, realistic stocking, and parameters that do not swing every weekend. A common error is underestimating their social needs; keeping fewer than six can lead to stress and aggression. neglecting to provide adequate cover can result in timid behavior and reduced activity levels, detracting from their natural charm.

Building a community? Run the full list through the stocking calculator before you add anything else.

Log tests and reminders in App-aquatic—free, same data you see here.