Honestly I've only seen one that I KNOW is a true Briggs, I think the other guys I saw during my W/C were pond snails but I'm going to let them get a bit larger until I know for sure. The one that is def a Briggs is trailing all over, hes SO fast... the others are just hanging out inside one of the pieces of wood in the tank... There were a couple of other eggs but I cleaned out the tank and at the time didnt know what they were so I took them out... oops well see if any more show up!