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 backs of large whales, or ashore.

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.