The yellow polyps stung the condy anemone and left marks, had to remove polyps. No problem from anemone to corals or fish - just keep them away from direct contact.
Also have the tube anemone (not anemone at all, technically) - the fish recovered from the sting in two days, one fish only - other didn't come closer. Hammer coral recovered within days, sun coral babies - in may be a week.
It was my fault - placed the too close in the first night. In store the anemone looked 3x smaller, and in tank it expanded to 11" in diameter, it took time to redo the aquascaping to accommodate this creature. The plus is, that they do not require the light.
Gorgeous creature! I only wish, that they were smaller (but the condy grows big enough too), or that I started with them, and not with fish and corals.