Weredolphin

A weredolphin was a type of lycanthrope that could take the form of an elf-like humanoid or a dolphin.

Description
Weredolphins enjoyed resting on the shore or on the backs of large whales.

Combat
These werebeasts attacked by ramming their foes. Weredolphins could summon up to ten other dolphins or even a couple of whales to aid them.

Ecology
They swore weresharks, and other evil aquatic weretypes, as their enemies.