The reason I am posting was the following activity by the dominant male snake was a behavior I have never seen before despite diving with these animals for years. The male rewrapped his body along the upper portion of her torso and while attempting to engage in coitus he began to tap her head fairly hard. The effect was to keep her head down in the rocks. I can only assume this was a dominance action and kept her head down and prevented her from swimming away.
As I reviewed the picture series last night I saw from this photo that the male is not only butting her head but has his fangs either in her skin or pressed against her head.
Just wanted to share!
