I've often read about aquatic snails being a part of the menu for certain fish but I often overlook or forget about them since I've never seen them until I was reading a book by Ralph Cutter recently, and doing some research on different sunfish besides Bluegill and came across the Redear. Does anybody know if there's any of importance in the valley or in the Sierras? And if so are there different species? How big and what color? Do they tend to be sub-surface? Do they float or are do they kind of have a neutral buoyancy? Also do you think some of our terrestrial gastropods end up in the drink at any point or regularity?

Trying to add some new things to my arsenal, so I'm a bit curious. Any help would be greatly appreciated.