at that size.. bloodworms, and blackworms.. as for your inhabitants.. eventually your eel and your crayfish will have it out. eels are invertibrate eaters.. so eventually it will pick at your cray if the cray doesn't decide to eat it first. this happens time and again with people.. as for spiney eels.. peacocks don't tolerate others of their same species very well unless in a large tank. as for getting it more outgoing.. time, and patience will help. as will offering it food from your hand. Once it associates you with food it will come out everytime it sees you and beg like a dog. But this can be as time consumeing as trying to teach a real puppy.