Dart

The dart is an ability possessed by several aquatic/semi-aquatic creatures. This dart gives damage to any creature it comes in contact with as it darts and is used as a fast, but physically expensive method of propulsion.

This is a list of those that have it:

Lurdusaurus, Kronosaurus (sort of), Elasmosaurus, Ichthyovenator, Mosasaurus.

Lurdusaurus possesses a quite powerful dart. Ichthyovenator has a similar one, though it barrel-rolls and generally travels a further but less accurate distance. Elasmosaurus has a rather weak dart, almost useless because it's so quick generally. Mosasaurus has a middling dart. It is mostly useful in combat situations.

Kronosaurus cannot dart, but rather has a lunge it can charge up with the same key. It deals injury damage to the target and is extremely powerful and useful over long distances.