Onca Explorations Mazatlan

Whether it is watching the amazing humpback whales, swimming with wild dolphins, snorkeling the islands, kayaking among mangroves, or discovering ancient petroglyphs while hiking on a natural protected area, our experienced staff, small group policy, and personal attention make simply the best ecotours in town!

We design and perform nature based tours & wildlife conservation adventures in Mazatlan, Sinaloa and northwestern Mexico.
Founded and operated by marine biologists and ecologists, ONCA is the first research based whale watching operator in coastal waters off Sinaloa. Our daily expeditions allow for an alternative platform to monitor local marine mammal populations and marine environment.

Wild Dolphin Adventure

Experienced marine biologists, ecologists and naturalists will guide this expedition providing you with outstanding commentary about local environment and sharing real time insight into the lives of dolphins while collecting scientific data for current research and conservation projects.

Whale Research Adventure

Marine biologists, ecologists and naturalists will guide your adventure out sea with outstanding commentary about local environment and sharing real-time insight into whales’ ecology and behavior while collecting scientific data for on going research and conservation projects.

Marine Safari on the Isla Clarión

The Isla Clarión is a classic 65 ft. boat built in 1953 for chartes and sport fishing in Long Beach, California. After serving generations of happy anglers for decades all along central and northern California, the Isla Clarion has found a new life in Mazatlan for the enjoyement of all locals and tourists in search for adventures at sea.

Kayak & Snorkel Adventure

Explore the islands of Mazatlan on your own Kayak, and Snorkel in some of the best locations most tourists never get to see! So paddle up! and join us on this unique coastal adventure.

Island Snorkeling Expedition

Capturing the very essence of the bay of Mazatlan, this tour is a marine adventure to be enjoyed by all! Great scenery, wonderful wildlife, friendly guides and the best snorkeling around makes this the perfect way to experience the bay of Mazatlan and its majestic islands.

Las Labradas: Petroglyphs

Join us on a journey back in time and re-live thousands of years of ancient cultural traditions while we explore one of the most captivating archeological sites of northern Mexico: Las Labradas petroglyphs.



Río de la Plata 409, Las Gaviotas, Mazatlán, Sinaloa


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GONSF 29/06/2017 11:26 am
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Gladis at the tour desk of the El Cid Marina hotel highly recommended this tour and we were not disappointed. Jesus, who was our tour guide and marine biologist is very passionate about his job and it really shows in his enthusiasm and knowledge. There were 8 of us on a small boat and we set out on a 5 hour tour. Make sure you go to the bathroom first as there isn’t one on board. And if you get seasick easily, make sure to take your medication. Non-alcoholic beverages and a baguette (we had ham & cheese), were included. Jesus and the captain are constantly on the radio talking to other boats in the area to try to find dolphins, whales, etc. There can be some ‘down time’ as they try to find the animals. On this particular trip, we ended up finding and observing almost a dozen killer whales total, in different spots, feeding on manta rays. It was truly spectacular watching the whales ‘herd’ the hundreds of rays and teaching their young how to hunt. Jesus even jumped in the water with them as he was so excited to observe this rare occurrence of migrating killer whales. We did find one humpback but only got a glimpse of the tail fin as they tend to stay below the surface longer and it was toward the end of the tour. Great experience we would do again!

Mickey 18/03/2017 9:08 am
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Product / Food

Excelente opción en mazatlan el tour muy divertido y didáctico los tres son excelentes personas y es una experiencia fantástica.

Will 02/02/2016 9:45 am
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Product / Food / Service

Oscar and Belin never disappoint this expedition. They explain and educate you as if you are a marine biologist in traning