Taufa
In the mythology and religion of Tonga, Taufa was a sea god worshipped by chief Tungi of East Tongatapu and by the royal family of Tonga because he cured the Tongan king George I.
He also protects gardens. In order for a homeowner to gain this protection, they had to braid a coconut leaf into a shark shape.
Taufa is both a sea and a land god. As a sea god he appears as a shark.