Spend a full day snorkelling three sites on the Agincourt Ribbon Reefs, right on the outer edge of the Great Barrier Reef, from Poseidon, a 24-metre catamaran built for snorkel and dive trips out of Port Douglas. A marine biologist briefs you at every site, lunch comes with prawns, and from May to September you may get to swim with dwarf minke whales.
Days
- About 8 hours
Age
- All ages with an adult; diving from 12
Group size
- Shared reef cruise
Start / finish
- Port Douglas marina / Agincourt Ribbon Reefs / Port Douglas marina
- Port Douglas, about 4:15 to 4:30pm
Return
- Port Douglas, about 4:15 to 4:30pm
Transport
- 24-metre reef catamaran from Port Douglas
Meals
- Morning tea, buffet lunch with prawns and afternoon tea
Route
Included experiences
- Agincourt Ribbon Reefs — snorkel three outer reef sites
- Reef Biosearch — marine biologist briefing at each site
- Dwarf minke whales — swim with them in season under a special permit
- Eye on the Reef — help count marine life on a timed survey swim
Pictures / Videos
Reviews
4.9
Based on 33 reviews
Verified from
Real reviews from travellers who've done this tour, gathered from around the web and paraphrased.
AI summary of 33 reviews
Travellers consistently praise the crew's attentiveness, knowledge and friendliness, along with the quality of snorkelling equipment provided and the generous food offerings on board. The standout feature is the visit to three different snorkel sites selected daily from a larger pool of options, with abundant marine life including sharks, rays, turtles, giant clams and colourful coral visible at each location, and smaller passenger numbers that prevent the boat from feeling crowded. The most common caveat is seasickness, with several travellers noting rough conditions on the way out or return journey and recommending travellers bring seasickness tablets or ginger; one reviewer also noted that diesel fumes from the open deck briefing area caused discomfort for those sensitive to them.
How we collect and publish reviews
Where they come from. Our reviews are gathered from independent review sites and from guests who share feedback with us directly after their trip. They come from people who have actually travelled on the tour. Some longer trips are made up of shorter tours we also sell, run back to back — where a review was written about one of those legs, the review says so.
Why some are edited. Many of our guests travel in their second or third language. Where a review is hard to read, we lightly edit spelling, grammar and punctuation, or paraphrase a sentence for clarity. We never change the rating, the meaning or the sentiment, and we never write a review on a guest's behalf.
Reading the originals. Reviews sourced from public review sites appear there in their original form, and can be read in full at their original source at any time.
We had to cancel our dives because we were congested, but we snorkelled all three sites, picked each day from dozens of options. The coral was spectacular, we saw blacktip and whitetip reef sharks, and the meal and crew were great.
Perfect weather and an uncrowded boat out on the outer reef. I just snorkelled and saw sharks, giant barracuda, triggerfish and moray eels, helped marine biologist Glenn with a fish count, and went back for seconds at lunch.
An amazing day on the reef, a smooth operation with great food and an attentive crew.
The coral was beautiful and full of colourful fish, and above all the crew were kind and caring. Thanks for the day.
Worth it. Great staff, gear and catering, and marine biologist Glenn gave real expert insight.
A beautiful tour with great snorkelling spots. Thanks to the lovely team on board and in the office.
