Ive noticed at night one of my emerald crabs crawls up on the kenya tree and just chills there all night long. But he only does it once the lights go out and the lunar led's come on.. The kenya gets ****ed and shrivels up but by morning when the light comes back on the crab goes away and the tree goes back to normal size. Ive looked for gnaw marks and signs of missing branches but i haven't noticed anything out of the norm.

Has anyone ever seen or heard of this before? Should i worry about anything?