Gardner's Killifish Identification Guide
Identify Gardner's killifish by its stocky blue-green body, rows of red spots, and rounded red-orange fins in males.
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Key identification features
- Small to medium size, up to about 2.5 inches
- Stocky, moderately compressed body
- Males show a blue-green base color with rows of red spots along the sides
- Red-orange dorsal and anal fins, often edged in blue-white
- Caudal fin rounded to slightly pointed, without long extensions
- Females are tan to olive with only faint spotting and shorter fins
Common look-alikes
- Blue gularis: much larger overall, with elongated, pointed fin extensions rather than Gardner's rounded fins
- Lyretail killifish: has a forked, lyre-shaped caudal fin instead of Gardner's rounded tail
- Emperor killifish (West African trade type): shares blue-green coloring but typically shows more pointed fin tips in mature males
Where you'll see one
Gardner's killifish is native to Nigeria and Cameroon in West Africa, where it inhabits small forest streams, swamps, and temporary pools formed during rainy seasons. In the aquarium hobby it is popular for its manageable size and vivid coloring compared to larger relatives like the blue gularis.
Frequently asked questions
How do I tell Gardner's killifish from the larger blue gularis?
Gardner's killifish stays smaller and has a rounded caudal fin, while the blue gularis grows much larger and develops elongated, pointed fin extensions.
What pattern feature marks a male Gardner's killifish?
Look for rows of red spots over a blue-green body along with red-orange fins edged in blue-white, a combination not shared by plainer females.