Sea of Giants: Monitoring Marine Life in Baja

Whether you're preparing for your upcoming expedition or simply want to learn more about Baja California Sur, these resources provide a closer look at the marine life and ecosystems you'll encounter along the way. Learn about humpback whales, bottlenose dolphins and whale sharks, explore the waters where researchers conduct their studies and discover how environmental change is shaping the future of Baja's coastal ecosystems.

Why Is Baja California Sur One of the Best Places in the World to Study Marine Giants?

Baja California Sur is one of the best places in the world to study humpback whales, bottlenose dolphins and whale sharks. Nutrient-rich waters in the Sea of Cortez and along the Pacific coast support exceptional marine biodiversity, making the region a global hotspot for marine wildlife.

The area is also an important center for marine conservation research. Scientists monitor how whales, dolphins and whale sharks respond to changing ocean conditions, including marine heatwaves, coastal development and tourism activity. Participants on Earthwatch's Sea of Giants: Monitoring Marine Life in Baja expedition contribute to this research by helping scientists observe wildlife and support long-term monitoring efforts.

With abundant wildlife, accessible marine habitats and ongoing scientific studies, Baja California Sur offers a unique opportunity to contribute to research while helping scientists better understand a rapidly changing ocean ecosystem.

Quick Facts—Sea of Giants: Monitoring Marine Life in Baja

• Location: La Paz and Todos Santos, Baja California Sur, Mexico

• Primary species: Humpback whales, bottlenose dolphins and whale sharks

• Key activity: Boat- and land-based marine wildlife monitoring

• Conservation focus: Marine ecosystem change, sustainable wildlife tourism and long-term marine monitoring
  
  

What Wildlife Will I See on a Sea of Giants Expedition?

Humpback whales, bottlenose dolphins and whale sharks are the primary focus of the expedition, but Baja California Sur supports an extraordinary range of marine wildlife shaped by nutrient-rich ocean currents and the meeting of desert and sea. Wildlife sightings on the Sea of Giants expedition may include whales, dolphins, whale sharks, California sea lions, mobula rays and a variety of seabirds.

Wildlife sightings vary with ocean conditions, migration timing and weather, making each day on the water different.

Participants may encounter:

• Humpback whales migrating along Baja's Pacific coast

• Bottlenose dolphins traveling through La Paz Bay and coastal waters

• Juvenile whale sharks gathering seasonally near La Paz

• California sea lions resting on rocky islets and swimming through shallow bays

• Mobula rays leaping from the water in large schools

• Seabirds such as frigatebirds, pelicans, gulls and other coastal species

• Tropical fish and reef life while snorkeling in protected bays

The Sea of Cortez is one of the most biologically productive marine ecosystems in North America, supporting rich food webs that attract whales, sharks, dolphins and other marine wildlife throughout the year.

What Is the Climate Like During a Baja Expedition?

Baja California Sur has a warm, dry coastal climate with strong sun exposure and generally mild winter temperatures. Conditions on the water can change quickly, with wind and ocean conditions influencing daily fieldwork.

Fieldwork takes place in exposed marine and coastal environments where heat, wind and sun can feel more intense during long hours outdoors.

What Should I Pack for a Baja Expedition?

Participants should pack for warm, sunny marine conditions and active days spent both on the water and along Baja’s rugged coastline. Strong sun exposure, wind and changing ocean conditions make lightweight layers and secure gear especially important.

Recommended items include:

• Lightweight, quick-drying shirts and pants

• Long-sleeved sun-protective clothing

• Lightweight waterproof jacket or windbreaker

• Closed-toe shoes with good traction for boats and rocky terrain

• Sandals or water shoes with secure straps

• Wide-brimmed hat

• Polarized sunglasses with a securing strap

• Sunscreen and SPF lip balm

• Small daypack or dry bag

• Refillable water bottle

• Swimsuit and towel

• Snorkeling gear if participating in optional in-water activities

• Motion sickness medication if prone to seasickness

Layering is helpful during boat-based fieldwork, when wind and ocean spray can make conditions feel cooler than expected. Dry bags and secure straps are recommended to protect electronics and loose gear on the water.

What Will I Experience on Sea of Giants: Monitoring Marine Life in Baja?

Participants assist scientists with ongoing marine wildlife research across the waters of Baja California Sur, contributing to studies focused on humpback whales, bottlenose dolphins and whale sharks. Work may include photographing whales and dolphins for identification catalogs, recording behavioral observations, listening to whale vocalizations through hydrophones and documenting how marine wildlife responds to tourism activity and changing ocean conditions.

Traveling between La Paz Bay, offshore waters and Pacific coastal lookouts near Todos Santos, participants experience Baja’s striking desert-meets-ocean landscape while contributing to long-term marine conservation research.

What Does Daily Fieldwork Look Like?

Fieldwork combines boat-based marine surveys with land-based observation from coastal research sites. Mornings are often spent on the water searching for whales, dolphins and whale sharks while assisting scientists with behavioral observations, photography and environmental data collection.

Afternoons may shift to cliffside observation points overlooking the Pacific, where participants scan for whale activity from shore and help document movement and behavior. Depending on weather and wildlife conditions, some days may also include hydrophone work, whale shark tourism assessments or snorkeling activities in protected coastal waters.