All seems peacefull on the lakeshore and the group spends an uneventfull 15 minutes wandering about the southern side of the lake, when you notice a dark shape moving under the water. It's about 30 feet away from the shore, and doesn't seem inclined to come closed, but the smooth agressive movement through the water seems seeped in menace. The water isn't particularly clear, and you don't have a very good view of it, but the dark shape seems sort of fish shaped.