A crayfish
Campfires slowly go out on the bottom of a limestone quarry, only stars shine on the night sky above rock formations, the Moon is new. Water was warmed up by recent hot weather enough to stay warm for entire night and crayfish are peering on shallows in large numbers. They slowly walk over stones, hide into crevices if disturbed by a handlight and rise their claws if the camera comes too close to water surface. There are not much other places, where they can be seen in such numbers.