For me Nardao starfish are the best for asterina control, they do also scavenge other dead material, have seen them scavenge on frozen food that gets stuck in the rockwork. I have 5 in a 3ftx2ftx2ft tank, and have had them for well over a year now, seem to be doing well (one even regrew a leg completely that the wavemaker amputated), and only rarely see asterinas anymore.



