Indonesian authorities bombed the last major illegal toothfish vessel on Monday after it evaded international authorities for years, reiterating a strong message to would-be poachers who enter the country's waters.

The Nigeria-flagged Viking was seized by Indonesia's navy on Feb. 25 in waters off Tanjung Berakit in Riau Islands province south of Singapore. It was among a half dozen ships dubbed the "Bandit 6" by the nonprofit Sea Shepherd Conservation Society, which hunted the boats and was among those who alerted Indonesian officials when the Viking entered the country's waters.

Siddharth Chakravarty, Sea Shepherd's campaign leader, says the Viking was operating as a so-called ghost ship, frequently changing its name and registry and not broadcasting any satellite signal that could be tracked.