Blue Gularis Identification Guide
Identify the blue gularis by its large size, blue-green reticulated body, and the pointed, extended fin tips of mature males.
Read the full Blue Gularis encyclopedia entry →Key identification features
- Large for a killifish, with males reaching up to 6 inches
- Elongated, robust body with a blue-green base color overlaid by red-orange reticulated (net-like) spotting
- Pointed, elongated extensions on the dorsal, anal, and especially caudal fin in mature males
- Dark blue-black bar or blotch near the gill cover
- Upturned mouth positioned for surface feeding
- Females are much plainer, tan to olive, with short, rounded fins
Common look-alikes
- Gardner's killifish: smaller and more compact overall, with rounded rather than pointed, extended fins
- Lyretail killifish: much smaller body size and a forked, lyre-shaped tail rather than the blue gularis's pointed fin extensions
- Other large Fundulopanchax species: distinguished mainly by exact color pattern and geographic origin
Where you'll see one
The blue gularis is native to coastal West Africa, including Nigeria and Cameroon, where it inhabits swamps, seasonal floodplain pools, and slow-flowing streams. In the aquarium hobby it is kept in soft, acidic water and is known for its striking size and long finnage among the killifish family.
Frequently asked questions
How can I tell a blue gularis from a smaller West African killifish like Gardner's killifish?
Size and fin shape are the giveaways: blue gularis males grow much larger and develop distinctly pointed, elongated fin extensions, while Gardner's killifish stays compact with rounded fins.
What single feature best confirms a mature male blue gularis?
The combination of pointed, elongated tips on the caudal, dorsal, and anal fins together with the dark bar near the gill cover is the most reliable confirmation.