Nothobranchius rachovii, the bluefin notho, is a species of freshwater annual killifish from Mozambique. It can grow up to 6 cm (2.4″). It is popular among killifish enthusiasts, who raise them from eggs in aquaria. Aside from the typical orange and blue variant, there is Nothobranchius rachovii KNP Black, which has much darker colors, and was collected from the wild in Kruger National Park, South Africa in 1984,[4] and Nothobranchius rachovii var. Red, which has a red head with turquoise highlights. The females of all varieties are more neutrally colored. This shows sexual dimorphism among these fish.