• Scientific name: Fundulopanchax gardneri
• Synonyms: Haplochilus brucii, Fundulopanchax gardneri, Aphyosemion gardneri, Aphyosemion brucii, Fundulus gardneri
• Common name: Steel-blue Aphyosemion, Gardneri Killifish
• Group: Killifish
• Habitat: Western Africa, Nigeria, western Cameroon
• Size: 5-6 cm
• Biotope: Inhabits in waters of savannahs and forests of west Africa
• Social behavior: A relatively aggressive, intolerant annual species. Males often fight among themselfs, nibble at fins and harras female. 
• Diet: Carnivorous; live foods, flakes on occasion.
• Breeding: Quite easy
• Tank: Minimum 40 litres
• Population: 1 male and 2-3 females for 40 litres
• Decoration: Needs a tank with plenty of hiding places and soft slightly acid water. Add some floating plants to the tank. A combination of a peat layer in the tank, and filtration over peat creates the proper environment.
• Temperature: 20-26°C
• pH: 6-7
• Hardness: 5-8NK°
• Lifespan: 2-3 years

Description: In different locations the species is found with different color patterns. A number of subspecies have been described. Two morphs are commonly available in the hobby. The first has a bright green body with a bright bluish iridescence. The body is marked with irregular, red spots. The fins are similar in color to the body and the anal, caudal, and dorsal fins have single red, lateral stripes followed by a broad yellow edging. The second variant has a virtually identical color pattern, except the back coloration is pale blue-violet.

Male is brightly colored with 30 to 90 red dots along the body. Female is less brightly colored with numerous small brown dots on the sides. Given the right conditions, adult pairs will readily breed. For breeding use water temperature between 24-26 °C. The courtship is fascinating to watch, since the pair swim around as if they are one fish, with the male swimming in contact with the female. The species spawns on finely-leaved plants and the fry usually hatch in 14 to 21 days. The parents won´t eat their own eggs. A diapause can be forced by drying the tank though the embryos do not survive longer for it. The water must be returned after 28-30 days. Fry when born will take small mysis or brine shrimp naplii.