So any ideas why an adult Platy would just die? My tank is very healthy , great readings with API liquid test kit, 50 % WC every Sunday. I m a certified veterinary technician so I did a necropsy. Nothing in her intestinal tract ( had fed peas the day before, was worried she d eaten too much), no visible parasites. She was full of embryo that were undeveloped. Haven t had a male in the tank for weeks. All fish look great today including the other 4 Platys. Would appreciate any feedback. Thanks!