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 prioritising 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 behaviour, 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.