My dad has a saltwater fishtank which he recently added a few snails to. I thought they might make a good timelapse subject, and this seemed to turn out relatively well, although it is a little bit choppy.. The large fish is a friendly (if skittish) batfish that we have dubbed Bruce.
I found it interesting how the snail became inactive, and pulsed occasionally. I had never really considered if snails slept or not. In looking it up, I found this interesting article on phys.org : ‘First evidence of sleep in snails’. I also found some anecdotes from people about their snails sleeping like that, although not a lot concerning turbo snails. As my mom pointed out, it could also be some kind of resting for digestion, but not full-on sleep. That makes sense too. I wonder which one this was? Also, what might that occasional pulsing have been? I will look into it more, and if anything fascinating turns up, will make a follow-up post.