I am unsure what is going on with my zoanthids. My tank has been running for a few years and I just recently bought these zoanthids and they were doing great. Well last Saturday I was trying to catch a fish that I needed to get out of my tank. Long story short I had a hard time getting him and I had to move all my rock. After that day only about half would be open at a time, they all use to be open. Since then Ive only seen 1/4 to 1/2 open and some look like they are excreting black stuff from their mouths. What is this?
Here is a before picture about 2-3 weeks ago.
And how they look today.
Here is a before picture about 2-3 weeks ago.
And how they look today.
