I remember that similar animals with lighter colour were seen in a drainage besides a slope near my home. I don't know whether they're the same species but it surely is an crustacean. I've even seen females with eggs on abdomen, similar as in shrimps. However, the habitat is not seawater/rocky shore, it's freshwater (I suppose) instead.
[ 本帖最後由 kinson 於 2008-3-19 08:48 編輯 ]