Morimori is also a clan of Maori, they arrived in Aotearoa in one of seven waka.
Traditionally, Maori and all other Polynesian and sub-Pacific ethnic groups have the customs to dine on defeated enemies. It was a way to inherit the very essence of their souls and mind.
Even Captain witnessed on his 3rd voyage, there were 2 of his men went missing. And their skulls and guts were found lying on the coast 2 days later.
Some extreme case like what happened to Marc-Joseph Marion. 26 people including the captain were ambushed by Maori and eaten. Parts of their remains were found in the village by other sailers.