• 66-11 Kamehameha Hwy - One Ocean Diving is Hawaii’s original and oldest company to offer no-cage, freediving shark encounters. Since 2007, we have pioneered sustainable shark tourism, providing unforgettable experiences while prioritizing research, education, and conservation.

We allow guests to observe, swim, and free dive down to sharks in their natural environment through respect alongside our marine biologist and professional shark safety diver. Our approach is backed by decades of scientific research and observations, ensuring safety and an ethical connection with these majestic ocean predators.

As the first company in Hawaii to introduce no-cage shark diving, we set the standard for responsible wildlife encounters. Our small-group tours are led by expert marine naturalists trained personally by Ocean Ramsey. We share insights into shark behavior, ecology, and conservation efforts like no other.

Whether you’re an experienced diver or new to ocean adventures, One Ocean Diving offers a once-in-a-lifetime opportunity to swim alongside sharks in the wild—the way it was meant to be.

Book your shark diving experience today and join the legacy of Hawaii’s original no-cage shark encounter.

• Use of snorkeling equipment

One Ocean Diving, established by shark researcher Ocean Ramsey, introduced Hawaii’s first no-cage freediving shark tours. As the original and most seasoned operator, they focus on ethical, educational interactions within sharks’ natural habitats. Their distinctive passive observation method—refined over decades of research—enables sharks to engage on their own terms while aiding conservation science.

Small-group tours, guided by marine specialists, prioritize education over excitement, promoting a profound understanding of shark behavior and ecology. Each dive contributes to global research efforts. They offer the most authentic shark interaction—observing them freely through freediving—creating transformative experiences that leave a lasting impact.

Beyond a tourist attraction, they facilitate meaningful connections with ocean wildlife while promoting shark conservation. Their status as Hawaii’s original no-cage operator ensures unparalleled expertise, safety, and sustainability in shark encounters.

For a full refund, cancel at least 24 hours before the scheduled departure time.