Hawaii No-Cage Freediving Shark Encounter

One Ocean Diving, founded by shark researcher Ocean Ramsey, pioneered Hawaii's first no-cage freediving shark tours. As the original and most experienced operator, we specialize in ethical, educational encounters in sharks' natural environment. Our unique passive observation approach—developed through decades of research—allows sharks to interact on their terms while contributing to conservation science.
Small-group tours led by marine experts emphasize education over thrills, fostering a deep understanding of shark behavior and ecology. Each dive supports global research initiatives. We offer the purest shark interaction—observing them freely through freediving—creating transformative experiences that resonate long after.

More than a tourist attraction, we provide meaningful connections with ocean wildlife while advancing shark conservation. Our legacy as Hawaii's original no-cage operator guarantees unmatched expertise, safety, and sustainability in shark encounters.

What to expect:

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.