my angels are very well behaved as angels go. They've always been kept with smaller fish since they were babies themselves so they don't see them as food - that doesn't mean though that I'd add anything small enough to be swallowed in one go like these new harlequins. They are really small this time around and the angels could just swallow them in one go. This is why I'm keeping them in with my baby cories until they double in size at least. Once they get there I'll feed my main tank something meaty like bloodworms and then add the new one's. Hopefully they'll just join the existing shoal and the angels won't notice ... if they are full of bloodworms that will help!