Johnstons topminnow

Introduction: Johnston's topminnow (Micropanchax johnstoni) is a small species of freshwater killifish belonging to the family Nothobranchiidae. It's known for its vibrant colours and unique breeding behaviour.

Habitat: Native to southern Africa, Johnston's topminnow is found in various countries such as Malawi, Mozambique, Tanzania, Zambia, Angola, Namibia, Botswana, Zaimbabwe and South Africa. It inhabits slow-moving or temporary waters like swamps, floodplains, and shallow streams. These waters often experience seasonal fluctuations in water levels.

Physical Characteristics: Johnston's topminnow is characterized by its striking colours and intricate patterns. Males typically exhibit more vibrant colours, including shades of blue, red, and yellow. Females are usually less colourful but still display intricate markings. Their size is relatively small, with males growing slightly larger than females.

Feeding Habits: In their natural habitat, these fish feed on a variety of small aquatic insects, larvae, and crustaceans.

behaviour: Johnston's topminnow is a peaceful species, but exhibit typical killifish behaviour where males might display territorial behaviour towards each other, especially when breeding is involved.

Size: Adult Johnston's topminnow reach sizes of about 3.8 to 5 centimetres, with males often growing slightly larger than females.

Breeding: Johnston's topminnow is known for its unique breeding behaviour. They are annual killifish, which means they have a short lifespan and rely on their eggs surviving in dry conditions until the rainy season returns.

Conservation Status: While detailed conservation data specific to Micropanchax johnstoni might be limited, many killifish species face threats due to habitat destruction and water pollution. Some killifish enthusiasts participate in conservation efforts and captive breeding programmes to preserve these unique fish species.