Stolireef
Active member
It's interesting. I saw a great presentation recently by 'Evolved' on wrasses. He showed a video that shows how wrasses mate by rapidly swimming up and down in the water column and indicated that for wrasses, escape generally means go up. Since our tanks are nowhere near as deep as the ocean, they simply run out of room and end up carpet surfing. I'll be the same is true for sand dwellers that need to go up to escape.