Lighthouse Reef Atoll, Belize Expedition

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Overview

Lighthouse Reef Atoll, Belize Expedition
Half Moon Caye, Lighthouse Reef Atoll, Belize
May 23 - 30, 2026
MarAlliance image
MarAlliance
$7,500
Deposit: $1,875

About this Adventure

A unique opportunity to advance tropical marine research in Belize

Are you ready to dive into a true scientific adventure? Join us on a journey that will bring you face-to-face with the ocean's most incredible creatures, all while playing an integral role in cutting-edge marine conservation. As an Expeditioner, you won't just observe — you'll experience what it's like to be at the heart of marine research.

Imagine exploring vibrant underwater ecosystems, surrounded by sharks, rays, turtles, and predatory fish — species that few are lucky enough to witness up close. With cutting-edge technology and guidance from our local team of experts, you'll be at the forefront of pioneering research, traveling by boat and snorkeling across this pristine atoll to record, measure, and track sharks, rays, and turtles, gathering vital data to protect the ocean's most magnificent creatures. This is your chance to be part of something truly extraordinary.

Our long-term monitoring research has already revealed critical insights into the populations, behaviors, and habitats of these marine giants in the different regions where we work.

By joining this Expedition, you'll be contributing to groundbreaking conservation efforts that directly influence policy, support local communities, and drive sustainable practices in one of the world's most biodiverse marine environments. Your participation will help ensure these species continue to thrive for generations to come.

Volunteer with Purpose

Join us on this unparalleled Expedition, where each moment promises discovery, adventure, and a profound connection with the mesmerizing world beneath the waves

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Immerse yourself in marine science and learn the following megafauna monitoring techniques:

  • Species Identification of Sharks, Rays, Turtles, and Piscivorous Fishes: Identifying marine megafauna by species is an important part of assessing biodiversity. Species ID will be used during in-water visual transects and in analyzing Baited Remote Underwater Video recordings.

  • In-water Visual Transect: Transects are a non-invasive method for assessing the diversity and relative abundance of marine megafauna. Each transect involves four swimmers positioned in the water and spaced 15 meters apart. Transects are 1km in length, and throughout the transect, each swimmer is responsible for recording species, quantity, distance estimation, and size estimation for the sharks, rays, turtles, and piscivorous fish they see within their area. You will learn species identification and size estimation techniques to accurately record data. Following field work, you can help to transcribe data to provide indices of species diversity, abundance, demographics, and size frequencies according to the different habitats sampled.

  • Baited Remote Underwater Video (BRUVs): BRUVs are structures made out of PVC pipe or metal that contain a GoPro camera and an extended arm with a bait cage. BRUVs are deployed at various sites around the Bay Islands for at least 60 minutes at a time in order to record species that are attracted to the bait. These videos are later analyzed to record the species and relative number of individuals and assess diversity and relative abundance.

  • Longline Capture and Tagging of Sharks and Rays: Scientific longlining is another method to assess shark and ray diversity and abundance, especially over long periods of time. This technique involves setting a line of 50 baited hooks in order to capture individuals and collect more specific measurements, tag the animal with a marker that will identify them in future captures or sightings, and collect a tissue sample for DNA and contaminant analysis. You will assist with baiting and setting the longline, collecting environmental data, and learning proper handling techniques for safely tagging and releasing sharks and rays.

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What's included

On-Site Training

From our team of expert biologists and research staff

Donation

Which provides all the resources necessary for our monitoring and research methods and local fisher and boat captain salaries

Accommodations

Double occupancy glamping “Yurt” style tents with unprecedented views of Half Moon Caye, where the reef meets the shore.

Transfers

Roundtrip boat transfer from San Pedro, Ambergris Caye to Half Moon Caye, Lighthouse Reef. Boat transfers between Half Moon Caye and field sites.

Meals

All meals (B, L & D + coffee, tea & water) starting with lunch on arrival day at Half Moon Caye through lunch on departure day from Half Moon Caye. Dinner & wrap party in San Pedro on the last night.

Conservation Fee

Marine Park conservation fee

Unforgettable Experience

Unforgettable, once in a lifetime experience and memories!

Volunteer Field Kit

Stream2 Sea products, Mar Cap, T-shirt, Buff (Gaiter), and a Dry Bag or Tote Bag.

What's not included

Flights

International or domestic air

Pre-Trip Costs

Accommodations and meals/beverages prior to arrival at Half Moon Caye and after departure from Half Moon Caye

Insurance

Travel, health or cancellation insurance

Personal Items

Incidentals

Location

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1. Half Moon Caye, Lighthouse Reef Atoll, Belize

Half Moon Caye, Lighthouse Reef Atoll, Belize

About your organizer

MarAlliance restores populations of tropical threatened marine wildlife. We co-create innovative tropical marine research, education and training that supports effective conservation and management of focal species and their critical habitats and builds new streams of income with coastal communities.

Reviews

Expedition Leader: Dr. Rachel T. Graham

From her early days growing up by the sea in Tunisia, Dr. Rachel Graham was drawn to research, conservation, and development across Latin America, Africa, and Micronesia. For over 30 years, she has worked with the private sector and organizations such as the United Nations, University of York, Smithsonian Institution, and Wildlife Conservation Society. In 2014, Rachel founded the international NGO MarAlliance to promote inclusive, grassroots science and marine conservation.

For over two decades, Rachel has lived in Belize and worked with fishers and partners in several countries to identify threats, research needs, and conservation opportunities for threatened marine wildlife and their critical habitats. Her work has driven megafauna research and conservation worldwide, and she actively serves on the IUCN Shark Specialist Group, co-founding several National Shark Advisory Committees to advance policy reform for elasmobranchs.

In recognition of her contributions, Rachel received the Whitley Fund for Nature Gold Award in 2011 and the Pew Marine Fellowship in 2021 for her shark research and conservation work. Rachel holds a BSc in Zoology from Oxford, an MSc from Edinburgh, and a PhD from the University of York, UK. She is especially proud of her two sons, who share her passion for fishing and marine conservation.

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