Clams - very possibly
SPS - probably not
LPS - the more fleshy varieties (brains etc.) are often nibbled by Centropyge angels
Softies - probably not
Mushrooms - no
Zoas - no
Dwarf angels are a gamble. Some are well behaved all their lives, some ignore corals for months or years and then suddenly develop a taste, and some go straight for your prized coral/clam the minute you add them to the tank. There's no way to tell.
That said, I love dwarf angels and think they're worth the risk. I don't keep clams and only have one LPS at the moment, but plan on adding more in the future. I just bought a coral beauty, and he's with me to stay - if he eats coral, so be it - I knew what I was getting into when I bought him
