chinook:  Crayfish eye (Orconectes) by Olaf Nelson Via Flickr: Crayfish eye, close-up. I can’t be certain of the crayfish ID, but it is most likely in genus Orconectes. The species may be virilis (Virile Crayfish), but there’s also the possibility that it’s the invasive Rusty Crayfish (O. rusticus). Caught in dip-net in the Clam River (a tributary of the St. Croix River) near Webster, Wisconsin (Burnett County). (Photo cleaned up in Photoshop to remove bubbles, debris, etc., and contrast and lighting adjusted. Color toned down but otherwise unaltered.) Aug. 1, 2015.