Hi, I have 2 Iridescent Sharks in my tank. They're still pretty small so my 55G tank is still holding them well. But will be switching to a bigger tank in the near future. I'm currently feeding them flake food and frozen bloodworms. Which they are feeding very well on. But i would like to have more food varieties for them. I've seen online where people feed them pieces of fish or prawns. I would like to do the same, but have no idea as to which whether i should cook it first or just feed them raw pieces. Another thing, they are so timid. Is there anyway i can do to let them get use to people walking near the tank or opening the lid for feeding times.