Another Pond - Crustacean Nation

The other day, on my walk; stopped at a out of the way pond with a little waterfall, which was flowing pretty strong, with yellow, chamomile looking buds floating in the fairly deep and big, little pond. It seemed they also gave off a subtle sweet scent of lightness. ( unlike the yellow ginger in my room which helps me to remember the heaven it can be). As i was looking to see how clean it would be to jump in, i saw a couple tiny minnows, and a little algae, And - a so far unidentified creature! -- Still a mystery, the black stick - like crustacean with one long, and i mean really long, (with an elbow) small rounded claw. He shot off as i approached, but returned as i sat by the peaceful water. Few know of this place, a hidden forest sanctuary, and i appreciated the calmness, while i watched this "water insect" move about...