Yes, they will eat their own.
If you want to raise the fry, I'd suggest adding places in the tank that they'll be able to go that the other fish cant. Some sort of decor, plants, etc. Somewhere to hide out so that some may make it until you can net them. With males and females in the tank, I promise you'll have plenty of opportunities to practice!
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8G Peacock Gudgeon, 75G CA/SA cichlids, 120G Planted, 50G Mixed Reef (
Build). 125G Reef and 100G frag tank in process.
Save the reefs... Buy captive raised when possible!