Sa death ng small fishes mo, bka hindi sila makakain dahil nauubusan sila ng food, mabilis kc kumain ang mga anthias, they should be fed atleast 2x a day., mabilis metabolism(mabilis magutom) nila kc very active sila...AFAIK, nd agressive ang mga anthias...
Sa hermit crab mo, best options mo for CUC will be snails...or you could use copepods(asuming maraming kang live rocks at cycling ka pa lng para makapag establish ng magandang colony bago papakin ng mga isda
), yes i also consider them as CUC(detrivores,), enjoyable pa na snacks for ur fishes...
Source: 6mos. of reading about reef tanks^^