It's at the end of the video, around 19 second mark. The smoke is coming from the bulbous disk on top of the urchin which is not visible right now. It looks like it is smoking. I am thinking it is releasing sperm cause that's what it looks like when I watch documentaries about corals spawning. Could that be what this is? Does anyone have any other ideas?
Side note, while I was waiting to catch it on video the snail in the pic "burped" some air bubbles twice. Is that normal?
Side note, while I was waiting to catch it on video the snail in the pic "burped" some air bubbles twice. Is that normal?