Yes, African dwarf frogs will eat dead fish. African dwarf frogs are opportunistic scavengers and won’t hesitate to munch on any dead fish they encounter, especially if they’re hungry.
However, you shouldn’t allow your frogs to eat dead fish. Eating dead fish may introduce a variety of bacteria and parasites into their systems and cause them to be sick. Additionally, the frogs probably won’t be able to finish the entire carcass, so the remaining fish meat will eventually rot and poison the tank’s water.
If you see any dead fish, you should remove them immediately. This will ensure the remaining tank residents will stay healthy.