Traits

A strong wide tail covered in segmented patches of thicker skin.

The grippers at the end can't move on their own and they are actually sensory organs. Leeches with this trait are incredibly spatially aware and cannot be snuck up on easily. 
It's very common to see paired with grabber claws, resulting in a leech curling this tail up and shielding prey or a favored toy to protect it from theft.