It's said in Perfect Memento that Sanzu is filled with lifeforms. When the Shinigami throw those who can't pay the ferry toll, they got eaten by those things.
It's said in Perfect Memento that Sanzu is filled with lifeforms. When the Shinigami throw those who can't pay the ferry toll, they got eaten by those things.
Many of which are otherwise extinct, as I recall. As appropriate, for the Sanzu River.