It was about 95 degrees today, but the breeze was constant and I was standing (up to my chest) in cool running water.  That's about as good as it gets. Not a lot of finds, because I was limited (due to water depth) to the top foot of gravel. Found a dolphin tooth, and a penny. Thanks to @Harry Pristis for the picture and ID. for the picture and ID. And then this Broken shark tooth.  I am always thinking Meg when I hunt.  It might be GW.  It is approximately 15 mm on each side.