Pseudomugil Gertrudae A colorful Rainbow Fish

Pseudomugil Gertrudae belongs to the rainbow fish and originates from Australia and New Guinea. It is not a killifish. They are found in small slow-flowing creeks and ponds with dense aquatic vegetation and leaf litter and less than 60 cm depth. The can be found in freshwater and brackish water as well.

Pseudomugil Gertrudae

Eggs available at the shop!

Substrates are mud or silt. Their habitats are generally acidic and have low conductivity.

The spotted blue-eye as it is called commonly gets not more than 2.5 cm in size. The overall color is transparent to white silver with tints of yellow.

Their diet consists of flake food which must be very very small, you can crush the standard size or frozen food. Occassionally you should get them some live food which today is available in almost all pet shops.

In the aquarium you should keep 10 – 14 with more females than males. They spawn in the tank as well, but not a lot of fry survives as they are fry eaters. You can put them in a breeding tank, provide moss and other fine plants and feed them live food before you put them in a breeding tank. Another option is to put a spawning mop made from nylon into the tank and they will lay their eggs into the mop. Collect the eggs regularly and hatch them in a seperate small container. So many more survive and you have control over their diet and health. After about 2 weeks depending on water temperature they will hatch and you start feeding them with infusoria, after a couple of days you can start with live freshly hatched brine shrimp.

Pseudomugil Gertrudae have a life span of about 3 years, so you should take care to breed them to add young fish to your tank.

You can get them live or eggs are available to hatch yourself and you can order eggs at

My Killifish Breeding