[Pete from Shawnee Mission]

In New Zealand orcas began to hunt together with local whalers. They shared in the eventual catch. Perhaps this porpoise did something like this and led local fishermen in fishing, or saved them by leading them home in the fog. People bury their pets why not a porpoise.

[SunkenCiv]

https://theculturetrip.com/pacific/new-zealand/articles/the-truth-behind-the-new-zealand-legend-of-this-heroic-dolphin/