now the 2nd (or ?) is assuming the position above to the ♀ she again rolled on her side & he sniffs her abdomen she shifts to her back & he up over her stopping to posture as above emitting a low throaty gargling sound from this position she giving normal call ♂ rolls over our - now they're just lying at the edge of the water I approached to see 2nd animal - ♂ & scared them both into the water out about 50' they began rolling over & over in the water around each spinning around & around, the ♂ going up over the ♀'s chest then they would both raise their heads out of the water growl & lunge at each other, but not biting ; at one time when the ♂ rolled belly up the penis was partially extended away from his body but not unsheathed, much more than usual