The blue lyretail (Fundulopanchax gardneri),[3] also known as the Gardner's killi and formerly as the steel-blue aphyosemion, is a species of killifish.

The males are more colourful than the females and have wavy lines of red spots which run along its body.

[2] The blue lyretail inhabits the tributary streams and marshes of the Benue and Cross River basins of Nigeria and Cameroon.

[1] They are apparently easy to maintain and breed although the males can be aggressive to other slower moving species.

[12] Gardner's killifish are generally kept in species-only tank, as they social are prone to becoming sexually frustrated in the lack of females, where then they will attempt to mate with often unrelated tankmates[citation needed]