What happens when the lights go out.

[Ross]

The other day, I tossed a piece of 3/4" pvc pipe in with nori tied to it.
My orange diamond goby proceded to bury this tube for a few minutes until the tube was no longer visable under the large pile of sand.
When I approached the tank, just before the lights go out fully, the goby took off like a rocket into the rather sizable hill of sand that he had just constructed. He managed hit dead center on a 3/4" pipe and stayed there for the night. Completly burried in this tube.


My clowns always dart to the same corner to sleep the moment the last light turns off.
My chromis always finds its way to the center of the birdsnest colony.
My Bi color chromis always swims back and forth out of its cave facing the same direction many times before finially packing it in for the night.


So this got me thinking what other bed time routines do out fish have?