Mysterious pulsating sand

[lastlight]

Have a wrasse that disappears in the evening?

Mine both like to 'explore' underneath the sand even when they're not going to bed. Just today my leopard dove under and it looked like the movie tremors as he literally moved through the sand (a good 6 inches). He popped halfway out of the sand and paused like that... just his head showing. The sort of thing you'd kill to snag a photo of but never going to happen).