Killies, or Killifish have two basic ways to differentiate from each other, which divides the species into two groups, you've got your annuals and your non-annuals.
Annuals- These are species that live on an average for 18 months, sometimes up to two years, they grow very fast from fry to breedable, and I quite often have 6 week old annual killifish breeding. They breed in peat, at normal tropical temps, and require very little tank space. The eggs need to be incubated dry, in the peat between 2-3 months depending on species, once the peat has matured, rinse it in some tank water, and watch the fry hatch out, depending on feeding and quality of the killifish, ive had upwards of 300+ fry hatch out at a time, from 1 weeks breeding.
Non-Annuals- These are the species of killifish than can live 3 years plus, majority breed using the mop method, where they spawn on the wool mop, the eggs stick, allows the keeper to remove mop and place eggs in a solution of something like blue meths or malachite green, which help prevent fungicide. Fry usually hatch in about 2 weeks. For some species the peat method of breeding can be far more effective though. Fry for both species are big enough to eat BBS when hatched. Allot of this species, if fed well can be bred in a heavily planted tank, and will live with various stages of there fry, no troubles.
Killifish are among the most beautiful tropical freshwater fish kept in the world, I would recommend them to everyone, with the right conditioning and water parameters, I would class them as easy to breed. Females Killifish are plain and ugly.....of coarse :lol:
Some pictures of my Killifish
Aplochiulus Lineatus (wild form) non-annual grows up to 13cm
Fresh hatch of Nothobranchius, this was from a teaspoon of a small bag of mature peat, yes those small things are fry
Nothobranchius Korthausae - Annual
Young, Nothobranchius Palmqvisti- Annual
Nothobranchius Guetheri Gold -Annual
Young, Nothobranchius Korthausae Yellow -Annual
Simpsonichthys constanciae (male and female) -Annual
Correct me if im wrong
Cheers Shae