The bunyip here was considered to have a magical power over humans, causing them considerable misfortune. Places where there were many eels tended to be where bunyips lived, as this was their food. On one occasion, Aboriginal people claimed that a bunyip lured a woman to her death by distracting her with a large catch of eels. It was considered extremely bad luck to kill or injure a bunyip.
Source: wiktionary