Okay, so some killifish are 'seasonal'. They only live for say 7 months so instead of getting them at the LFS mid life people hatch the eggs themsevles. Also the fish egss as long as they are keppt moist and warm are okay and will hatch, do not think that they will be okay if you don't ever put them in water. Read up on the specific species to see the process.
The reason killis do that is in the wild their little pools/ ponds dry up and the fish die. The egss stay there and if in the right conditions will hatch when the rain shows up. To be sure that not all the eggs hatch at once and die because it was just a simple rain, not floooding rains, the eggs stagger their hatching.
38 gallon :
Pelvicachromis Taeniatus Nigerian Red not yet breeding pair
4 Pangio Kuhli
12 Hemmigrammus Bleheri
2 Botia Lohachata
1 Botia Straita
1 Ancistrus Sp.
6 Poecilia Reticulata
The Wet Spot Portland Oregon!!!!!!
ADA: Do!aqua Iwagumi 10 gallon size!
7 Clown Killies
7 Ghost shrimp