That means, that the male after he has spawned with the female doesn't look after the fries any more. Only the mother protects them. When the fries swim around the father and the mother usually takes the same tasks. The open breeders have to lay very much eggs because their protection is not very good. They have many but smaller fries.
Open breeders are often a parent-family.
Cichlasoma species Cave breeders Cave breeders are better developed than the open breeders and they can lay less eggs. The eggs are bigger than and also the fries are bigger when they come out of the eggs. They can be parent, mother or father-mother families. Ovophile mouth breeders usually are mother-families with polygamous males, e.g. Tropheus and Aulonocara species. These are the species which are on the way of development to the ovophile-mouthbreeders.