How the Coconut Rhinoceros Beetle made 3000 Carnival passengers miss their port

• Thousands of Carnival Adventure passengers have missed their port call after their stop at Mystery Island was cancelled.
• The ship was running late to Mystery Island, which meant that it didn’t have time for a full port stop because biosecurity regulations don’t allow ships to stay at night.
• This is because emitting light at night attracts an invasive beetle to other South Pacific Islands.

Aussie cruisers are no strangers to port cancellations, especially when sailing in the South Pacific. However, there was an extraordinary reason why Carnival Adventure passengers, who were sailing to Mystery Island, had to skip the Vanuatu port.

Carnival Adventure, with likely more than 3000 passengers onboard, was delayed in leaving Port Vila, the stop before Mystery Island. Guests were then told why the ship would no longer be able to visit Mystery Island -biosecurity rules regarding an invasive beetle.

A letter to guests onboard read: “Vanuatu’s biosecurity regulation states that vessels are unable to travel to another island within Vanuatu after dark because of the potential risk of transporting a beetle that can damage coconut trees.

“We appreciate your understanding of the importance of these measures in protecting the local environment and economy.”

What is a Coconut Rhinoceros Beetle

It’s an invasive species on the island. They were first discovered in the South Pacific in 2019, and since then, their presence has been noted on more islands in the region.

These beetles burrow themselves into the crown of coconut trees, and feed on sap. They can severely damage the tree and often results in the tree no longer being able to yield coconuts.

This has become an increasing problem for the coconut and palm oil industries in the South Pacific, including Mystery Island. The light that cruise ships emit is thought to attract these beetles. The beetles then fly onto the ship and are then brought to other islands.

The islands have strict warnings for all ships, not just cruise ships, to depart no later than 4pm, a warning that has been reissued recently, with special guidance for the winter months.

The Biosecurity Vanuatu Department said: “Port Vila 14th April 2026- To help stop the spread of Coconut Rhinoceros Beetle (CRB) from Port Vila and Luganville to other islands, vessel departure times have been adjusted during the night serving period in Vanuatu from April to September.

“…Your cooperation is essential to protect Vanuatu from the spread of pests and diseases, including the Coconut Rhinoceros Beetle.

“Protecting Vanuatu is everyone’s responsibility — let’s work together to keep our islands safe!”

In this instance, because Carnival Adventure was delayed leaving from Port Vila, it would have needed to stay in Mystery Island later the allowed time to complete a full visit, and therefore, cruisers had to spend the day at sea instead. Those onboard were compensated with $100OBC per stateroom.

Whether this could prove more of a problem moving forward remains to be seen. It’s already extremely common for port stops in the South Pacific to be cancelled due to bad weather, so having strict time limits doesn’t help the case at all.

Cruise ships and crews will need to work extra hard to keep to schedule and attempt to avoid technical issues so that cruise passengers don’t end up missing out on the ports they’ve paid for, and the South Pacific islands can remain protected without risk.

While it might seem like a bizarre reason to miss a port, it’s definitely a worthwhile one and it’s important that cruise lines and passengers play their part in protecting the environments and communities that they visit.