Corals releasing substance

[Rusty Shackleford]

Today I woke up and as usual the first thing I do is check on my aquarium. All my corals zoanthids, duncan coral, frogspawn, and hammer coral frags, including my anemone were closed up, Or shriveled away into hiding. I gave it some hours and began to run errands. When I came back they remained the same, so I began pulling out my test kits and everything seemed in check. I ended up doing a water change anyways to see if it would help but nothing so far has happened. Later I noticed that my frags were releasing something into the water so I grabbed my phone and recorded what I could. Im not sure what it is, but I have never seen it before. Could this be corals using chemical warfare to fight. I had moved the corals around my tank the previous day but obviously allowed some distance from each other.

 

[Rusty Shackleford]

Looks almost like smoke is coming off the coral if looked closely at.

 

[Ds04384]

Looks like spawning