Dwarf newly hatched cuttlefish eating copepods and amphipods? I know some people have had great success? I have a H. O. T. Cpr fuge that is teaming with amphipods and also my main tank. But the question that I have is how long will amphipods be able to satisfy hatchlings? Me and mysis shrimp aren't on very good terms as far as keeping them alive that long and also I've read that there lifespan is only a couple of weeks anyway.