Please Help!!! These have been killing my star polyps. Its not Aiptasia or Majano

[brian4274]

These little brown looking things have been killing my polyps slowly. What are they and what can i do to effectivly remove them

 

[coralreefer]

is a better pic possible?

 

[chilwil84]

by the look of them they might be flat worms. flat worms tend to annoy corals and lead to slow death if they do it to much. a better picture would help

 

[cranberry]

They are colonial hydroids. They sting and indeed would be what is stinging your other corals.