Bionicle MOC: Shui Long 3

Shui Long, which means "Water dragon" in Chinese is Aqualia's Beast companion.

Dragons: Regardless of what element, dragons are very ferocious, majestic and loyal to their masters. But dragons of different elements do tend to have distinguishing behavioral characteristics. To tame a dragon is a considerable feat that that not many toas or any other race of bionicle have done. It is very unwise to anger a dragon since it may be the last thing that one may ever do.

Sea Dragons: Sea dragons can be found at any dept in the ocean. They have been known to come to the surface and even leave the water since they can breath both air and water, and they can be found at the greatest depths. Sea dragons are usually the less hostile toward toa and Matoran and are least susceptible to evil tamers like dark hunters and Makuta. They use their sharp claws, and bodies primarily in combat but when out of the water they can shoot a “water spike” which is a burst of water shot at lethal pressure. Serpent dragons Shui long have also been known to use constriction like a snake sometimes to subdue their opponents.

Hai zu: The Hai Zu, which means "sea tribe" in Chinese is a small group of reclusive Toas and Matoran that live under water but are not apart of Mahri nui that are known for their mastery of sea creatures. Sea dragons and the Hai Zu are closely associated. Aqualia is the first of her tribe to leave the Hai zu nomads. She left Archimedes Found her and Offered her a place in the Defenders of virtue. Her leaving is the main reason the Hai zu and their taming of sea creatures is known.

Aditional info Here I've posed Shui Long in a "traditional" Serpent dragon pose. This also partly shows off her flexibility which is pretty good.