Do angelfish eat there eggs?
Angelfish normally look after their eggs and youngsters but it is common for them to eat their eggs too. Many times two females will spawn together and then eat the unfertilised ova. At other times a true M/F pair will decide to eat their eggs. I believe they usually know what they are doing and are either having a practice run or they are only destroying a bad spawning. In my experience they usually get it right and produce young eventually.