IMO, nix the fish. Hatchling cuttles are tiny, it would be months before they could defend themselves and fish are not the best diet for cephs. Bandensis will never be as large as Hajar's Ramses is right now as they only grow to between 4 and 6 inches. Instead of fish, I recommend that your develop your clean-up crew while you are cycling and feed them heavily. I am more of a critter person than a fish fanatic (I do have a 5 fish but three are in the anemone tank and two are in the reef. I never put them in with cephs). There are interesting animals that you can add that will either survive your cuttles or become safe food. Serpent stars (avoid the green ones), brittle stars (I am very fond of the red ones), cucumbers (stay with Caribbean, the fancy ones will likely nuc your tank, avoid the apple altogether, small crabs (emeralds have a chance of survival but only a chance, however they will help with algae during your first year), shrimp (don't get expensive ones, they will ultimately become food), hermit crabs and snails can all be interesting. With effort, most serpent/brittle stars will learn to be hand fed if you enjoy interacting.