Fish ovaries may very well be of three types: gymnovarian, secondary gymnovarian or cystovarian. In the very first type, the oocytes are introduced right into the coelomic cavity then enter the ostium, then with the oviduct and they are removed. Secondary gymnovarian ovaries get rid of ova into your coelom https://aquariumaccessorie.blogspot.com/2022/09/how-to-set-up-aquarium.html