Just got home and was looking at my tank when I noticed that one of my Black Brittle Starfish was standing yes standing with all five legs like a camera tripod. His body was near the surface of the water and he started shaking and discharging this brown and black stuff from his body. I ran to get the camera but by the time I got back the event was over. Now my tank is very cloudy. Did I just witness brittle star sex? He has now assumed his normal position under his favorite rock. Will this hurt my tank?