Advertisement I put a rock in water dishes, many of them go completely under water and they just sit there completely submerged under the rock for I don't know how long, but it's for a long time. It's nothing new seen with Pandinus and Heterometrus but I didn't expect to see so many actually "prefer" to be underwater for such a long time. Sometimes I've seen as many as five crowded together under that little rock completely submerged. I'm sure there would be a lot more under if it were a bigger water and rock space there. I just let them do it, whatever, have enough that's there's no risk to the collection over here. Just thought it was kind of interesting.