While the pumps were off for breakfast feeding time I noticed this Banded Trochus spawning maybe? The Banded Trochus have reproduced once or twice in this tank prior.
I can't see your pic, but it's usually pretty obvious. I always see them at dusk, same as fish/corals. Here's about 1000 Astrea snails in a mass spawn, for example
Today saw one my Trochus snails releasing sperm. He kept doing that for 40/60 minutes. Does this happen together with one or more other snails releasing eggs? If you have pics or videos of your own snails doing the same, please post it on this thread. ;) VIDEO: Trochus snail spawning event