Corys do suprisingly well with monsters, the only things I have had eat them were one tank of rbps and a marbled goby. I like the bandit (C.metae), the panda(C.panda), the skunk(C.aruatus), the pygmy(C.pygmaeus), and the pygmy panda (sp.?). The bandit,and both pygmies form shoals which are very cool to watch as they leapfrog around.