Sun coral and dendro question

[EnFuego]

Ar these considered 'stinging corals'? As in, when people say xx shouldn't be kept with stinging corals, would you consider sun corals, dendros, balanophyllia and similar corals to fall into this category?

Thanks,
Mark

[CuttleKid]

They are "stinging" corals but their nematocysts are too weak to injure any fish. Rhizos are a completely different story. They can and will catch and eat anything that comes too close small enough for it to consume.