May I present Zurta: the fish Makuta!
Story: when Mata Nui created Zurta, a glitch caused Zurta to have a large fish-like dorsal fin. Mata Nui amped up Zurta's shapeshifting powers in an attempt to allow him to get rid of the spine, but no matter what form Zurta took the spine remained. Zurta embraced this, taking a fish-like form. He began supervising the creation of all aquatic Rahi, and was responsible for the creation of the first Sea Rahi (the ones from Adventures#5).
During the war between the Dark Hunters and the Brotherhood of Makuta, Zurta took it upon himself to attack Dark Hunter boats from underwater. Using his enhanced shapeshifting abilities, he was able to take the form of boats that led the unsuspecting Dark Hunters to their doom. This tactic only worked a few times before the DH's learned to check the bottom of their boats for a blue dorsal fin.
565 years after the Great Cataclysm, the Dark Hunters were hired by a Skakdi ruler to eliminate a group of Matoran the Skakdi believed to be thieves. The Matoran had been stranded on a small island, but Zurta offered them a ride to the mainland in his boat form. The boat was attacked by the DH's and took many blasts from their cannons, barely making it to shore. After dropping off the Matoran, Zurta attacked the Dark Hunters. In the fight that ensued, all of the Dark Hunters were killed and Zurtaaa was mortally wounded. The Matoran went on to tell the tale of the heroic Makuta who saved them.
The MOC: I liked the dark azure on Tahu 2016, but thought he didn't have enough, so I decided the world needed a dark azure and red MOC. I also gave it waist turning like the 2016 sets have.
Things I tore apart to make this MOC: Ackar, Perditus, Gali Uniter, Gali Master, Akida, Kivoda, Firedracax, rocket Tahu, Rocket Onua, my sister.