Two Stripe Lyretail Killifish Care Guide
Aphyosemion bivittatum "Funge" · Freshwater Fish
What Two Stripe Lyretail Killifish look like
The Two Stripe Lyretail Killifish (Aphyosemion bivittatum 'Funge') is a small, laterally compressed fish that typically reaches a maximum adult size of approximately 2.5 inches (6.4 cm). Males exhibit pronounced sexual dimorphism, characterized by their strikingly vivid coloration, which includes a palette of red, blue, and yellow hues, and the development of a distinctive forked lyretail caudal fin. This forked fin is not only aesthetically pleasing but also serves as a display feature during courtship rituals. The body is adorned with two prominent lateral stripes that enhance its visual appeal. Defensive adaptations include rapid swimming capabilities and the ability to quickly retreat into dense aquatic vegetation. The species also possesses a well-defined lateral line system, which aids in detecting vibrations in the water, and its dentition is adapted for a carnivorous diet, featuring small, sharp teeth suitable for capturing live prey.
Behavior & temperament
The Two Stripe Lyretail Killifish is primarily a social species, often found in small groups or pairs, although it is not an obligate schooler. It typically inhabits the upper to mid-water column, favoring densely vegetated areas in shallow waters. Breeding behavior involves the male displaying to the female through elaborate fin movements and color displays, with spawning occurring in floating vegetation where the female scatters eggs. The species is generally peaceful but can exhibit territorial behavior, particularly during breeding seasons, with males establishing dominance hierarchies. Their temperament is relatively calm, making them suitable for community tanks with other small, non-aggressive fish.
Diet & feeding
In the wild, the Two Stripe Lyretail Killifish is a carnivore, primarily feeding on small invertebrates and zooplankton. In captivity, they require a diet rich in high-quality live or frozen foods such as brine shrimp, daphnia, and finely crushed flakes to ensure optimal health and coloration.
Behind the name
Aphyosemion (from Greek 'aphyo' meaning 'to swim' and 'semion' meaning 'sign' or 'mark'); bivittatum (from Latin 'bi-' meaning 'two' and 'vittatum' meaning 'striped').
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Two Stripe Lyretail Killifish?
AquaLens identifies your fish and plants from a photo, tracks water chemistry, and flags health issues early — free on iOS and Android.
