Sea slugs??

clayton

Member
I am having a problem with what I think are Sea slugs or Nudibranchs. They are feeding on one species of green polyp only. The largest one I have seen was about 1cm long, white-cream coloured, with about a dozen longish appendages on it's back which are a bit like polyp tentacles.
I have to wash the colonies that they are attacking in fresh water to kill the slugs, but they are obviously breeding in the tank.
Has anybody else had anything like this, or advice on what else I could do?
 
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