Discus fish are beautiful. It's amazing they survived that trip. The best of the South American cichlids. I had tanks of African cichlids from when I was a kid and a teenager. I loved when they would have babies and occasionally a few survived and grew into adults. The african cichlids are mouth breeders. After fertilization they are scooped up and carried in a pouch inside the mouth and they hatch there and for a while and if I recall correctly the fry swim back into the mouth for protection until they are big enough to try and find hiding places in the rocks to feed and grow on their own.