MarAlliance Expeditions
Join Our Expeditions
Experience the life of a tropical marine field biologist while helping us collect invaluable data that will contribute to the conservation of these vital species.
Join MarAlliance’s team of marine biologists, guides and fishers for an unforgettable expedition researching sharks, rays and turtles. Experience the life of a tropical marine field biologist while helping us collect invaluable data that will contribute to the conservation of these vital species.
We will train you so that you can be directly involved in each aspect of our field work from conducting in-water surveys while snorkeling Caribbean reefs, to launching and reviewing the unexpected results of underwater camera traps, to setting longlines to capture, measure and tag sharks and rays. As an expedition volunteer, you will be immersed in the team and contribute directly to the critically-important long-term monitoring of sharks, rays and turtles in key Caribbean sites and Cabo Verde.

Playa del Carmen, Mexico
Dive into the world of Bull Sharks with our groundbreaking research expedition in Playa del Carmen, Mexico. Partnering with local experts from Baalche Proyecto Azul, this immersive experience combines cutting-edge science with hands-on conservation efforts. Capture stunning imagery under expert guidance, contribute to vital citizen science initiatives, and help uncover key insights into Bull Sharks’ habitat, migration, and reproduction. Using innovative methods like photo identification and Environmental DNA (eDNA) sampling, you’ll play a crucial role in marine conservation while experiencing the thrill of ocean exploration.
22-26 Jan & 20-24 Nov 2025
21-24 Jan 2026
Mexico – 4 nights / 3 activity days

Ambergris Caye, Belize
MarAlliance invites you to an unforgettable research expedition on the northern barrier reef of Belize, based on Ambergris Caye. Work alongside marine biologists, guides, and fishers as you help study sharks, rays, turtles, and large predatory fish. Gain hands-on experience in essential conservation techniques, from snorkeling surveys to tagging and data collection. Participate in cutting-edge research using longlines and Baited Remote Underwater Videos (BRUVs) while immersing yourself in the vibrant underwater world. Throughout the week, engage in expert-led presentations and fieldwork, deepening your understanding of marine megafauna and their critical habitats.
22 Feb – 1 Mar 2025
21-28 Feb 2026
Ambergris Caye – 7 nights / 6 activity days

Lighthouse Reef Atoll, Belize
Join MarAlliance for an extraordinary research expedition on Half Moon Caye, Lighthouse Reef Atoll, Belize. Work alongside marine biologists, guides, and fishers as you study sharks, rays, turtles, and other marine megafauna. Experience the daily life of a tropical marine field biologist while participating in essential conservation efforts. Engage in snorkeling surveys, tagging, and data collection to help assess population abundance and habitat preferences. Learn advanced research techniques, including setting longlines and deploying Baited Remote Underwater Videos (BRUVs). Throughout the week, deepen your understanding through expert-led presentations while exploring one of the Caribbean’s most stunning marine ecosystems.
24-31 May 2025
23-30 May 2026
Belize – 7 nights / 6 activity days

Gladden, Belize
Join MarAlliance for an unforgettable research expedition at Gladden, Belize, while staying on the picturesque Ranguana Caye. Work alongside expert marine biologists, guides, and fishers to study sharks, rays, turtles, and other marine megafauna. Experience the life of a tropical marine field biologist as you engage in hands-on conservation efforts, from snorkeling surveys to tagging and data collection. Learn advanced research techniques, including setting longlines and deploying Baited Remote Underwater Videos (BRUVs). Throughout the week, immerse yourself in the wonders of the Caribbean’s marine life while gaining valuable insight through expert-led presentations and fieldwork.
14-21 June 2025
13-20 June 2026
Gladden – 7 nights / 6 activity days

Las Perlas, Panama
5-12 July 2025
4-11 July 2026
Las Perlas – 7 nights / 5 activity days
Details Coming Soon

Isla Mujeres, Mexico
Experience the awe-inspiring sight of the world’s largest aggregation of whale sharks and manta rays near Isla Mujeres, Mexico. Just 30–45 minutes offshore, you’ll have the rare opportunity to snorkel alongside these gentle giants while contributing to a global citizen science initiative tracking their migratory patterns, residency, and population sizes. Led by Dr. Rachel Graham, Founder of MarAlliance and a pioneering expert in whale shark research, this expedition offers an unparalleled chance to witness and support marine conservation in action. Suitable for adults 18 and older, this adventure promises an unforgettable encounter with the ocean’s largest fish and rays.
19-22 & 23-26 July 2025
18-21 & 22-25 July 2026
Mexico – 3 nights / 2 activity days

Isla Mujeres, Mexico
19-22 & 23-26 July 2025
18-21 & 22-25 July 2026
Mexico – 3 nights / 2 activity days

Playa del Carmen, Mexico
22-26 Jan & 20-24 Nov 2025
21-24 Jan 2026
Mexico – 4 nights / 3 activity days

Ambergris Caye, Belize
22 Feb – 1 Mar 2025
21-28 Feb 2026
Ambergris Caye – 7 nights / 6 activity days

Lighthouse Reef Atoll, Belize
24-31 May 2025
23-30 May 2026
Belize – 7 nights / 6 activity days