One Ocean Shark Diving & Research

One Ocean Shark Diving & Research Cage-free snorkeling/free-diving with shark in Hawaii with a 100% safety record.

Snorkeling with sharks, snorkeling spot, swimming with sharks, shark diving, sharks

Have you ever seen a silky shark? 🦈Silky sharks (Carcharhinus falciformis) are a rare sight at our site, making every en...
08/27/2026

Have you ever seen a silky shark? 🦈

Silky sharks (Carcharhinus falciformis) are a rare sight at our site, making every encounter a special opportunity to observe and identify the differences between two often-confused species: Silky sharks and Galapagos sharks.

While both species share a similar body shape and can appear nearly identical at first glance, Silky sharks are generally more slender, with a smaller, rounded first dorsal fin, longer pectoral fins, and a characteristic silky sheen to their skin that gives the species its name. They also appear to have lighter eyes with golden or silvery hues than the darker eyes of a Galapagos shark (though this can vary per individual).

Their ecology differs as well. Galapagos sharks are more commonly associated with island ecosystems and coastal shelf habitats, while Silky sharks are highly pelagic, spending much of their lives in deeper offshore waters and undertaking extensive vertical movements through the water column.

These differences in habitat use and depth profiles are part of what makes encounters with silky sharks in Hawaiʻi so uncommon—and so exciting for divers and researchers alike.

Come test your luck. You never know what might swim by.
OneOceanDiving.com

📸 Ethan Rich

🦈 400 million years in the making.
 Sharks have roamed Earth’s oceans since long before the age of dinosaurs. As one of ...
08/15/2026

🦈 400 million years in the making.

 Sharks have roamed Earth’s oceans since long before the age of dinosaurs. As one of the planet’s oldest surviving species, they are the result of hundreds of millions of years of evolution — and every part of their body tells that story. ✨ Their skin is covered in tiny, tooth-like structures called dermal denticles, making them fast and silent swimmers.

🦷 Their teeth are designed for efficiency — falling out and regrowing thousands of times over their lifetime.

🌊 Their “sixth sense” allows them to detect the electrical signals of other animals, even hidden under sand.

🦴 Their skeletons aren’t made of bone, but of lightweight cartilage, giving them incredible flexibility and speed. Despite their evolutionary perfection, sharks now face their greatest threat: humans. Overfishing, habitat destruction, and a culture of fear have pushed many shark species toward extinction. But here’s the truth: sharks are not monsters — they are misunderstood. They play a vital role in keeping ocean ecosystems healthy and balanced. Without them, marine life suffers.

Sharks don’t need to be feared — they need to be protected.

 Let’s replace fear with facts. The ocean needs sharks, and right now, sharks need us.

HOW TO: turn fear into fascination for sharks. 🦈Start by educating yourself about their importance and ecological role i...
07/01/2025

HOW TO: turn fear into fascination for sharks. 🦈

Start by educating yourself about their importance and ecological role in the ocean.

Meet sharks in their own environment to experience how we can peacefully coexist with them.

Get involved—join beach cleanups or support organizations that protect sharks to grow knowledge and respect for these vital creatures.

Get connected by following marine biologists, and be inspired by their passion.

And finally, educate through media—watch documentaries like our brand-new documentary “Shark Whisperer”, our NOW on Netflix! 🌊💙

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06/10/2025

Nature’s choreography

Something so magical about watching these sailfish in formation not on the hunt. Just living!

💬:.encounters
🎥

an

05/21/2025

What has two types of tentacles and a red stomach? Tetrorchis erythrogaster!⁠
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This small deep-sea jelly, Tetrorchis erythrogaster, is just one example of the diversity of jellies found in the deep pelagic zone.

Generally found between 400 and 1,000 meters (1,312 and 3,280 feet), this species is bioluminescent, and its red gut presumably masks the bioluminescent prey that it consumes.

These jellies have two types of tentacles—four large tentacles that extend from the bell margin and have large, yellow tips, and 16 to 24 shorter tentacles that also line the bell margin. They are often observed with their four longer tentacles extended, possibly to capture unsuspecting prey. Their bell diameter only reaches about one centimeter (half an inch).

💬📹:

To learn more about marine wildlife and ocean conservation, FOLLOW 👇🏼







05/18/2025

🔊 VOLUME UP! Whale songs are more than just beautiful sounds—they could provide vital clues to our oceans’ health.

🐋 New research from Dr. John Ryan from the Research Institute reveals that hidden patterns in whale songs may be able to predict ecosystem shifts in marine environments.

By decoding whale songs, we gain insights into the health of our oceans. Let’s listen and protect.

🌊 Join Oceana to help protect these gentle giants with the .

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To learn more about marine wildlife and ocean conservation, FOLLOW 👇🏼






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05/16/2025

Mysids are often called marsupial shrimps (though they are not shrimps at all) because of the pouch, where their eggs develop into juvenile tiny mysids. This is very different from true shrimps going through multiple larval stages in the open water.

Try to watch the video till the end.

💬📹: the_story_of_a_biologist
📍North Sea, Skagerrak

To learn more about marine wildlife and ocean conservation, FOLLOW 👇🏼







05/15/2025

Can the ocean help stop ? A startup called Equatic, which began in a research lab at , has developed technology that uses ocean water to remove CO2 pollution from the atmosphere at 99,000-times the natural rate. The technology also generates valuable hydrogen fuel as a byproduct.

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05/13/2025

Gliding through the reef with style ⚡️

Native to the Indo-Pacific region and lacking natural predators in the Atlantic Ocean, lionfish populations have surged in the Caribbean. They prey on small fish and invertebrates, disrupting marine ecosystems and harming coral reefs by depleting essential reef species 🐠

Their spread is largely due to human activity, including accidental or intentional releases from home aquariums. It is crucial never to release lionfish or other non-native species into the wild, as this can lead to severe ecological imbalances 🌎

Conservation efforts focus on targeted removal through spearfishing, lionfish hunting tournaments, and promoting their consumption as a sustainable seafood option. Public awareness campaigns and research initiatives also aim to mitigate their impact and protect marine biodiversity 🪸

Follow .global to learn more about the Ocean’s incredible species & the ways we protect them and their habitat 💙

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💬: .global

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05/07/2025

Zesting up your week with the lemon jelly: Aegina citrea.🍋

The lemon jelly, Aegina citrea, is different from many other jellyfish because it has only four tentacles extending from its bell. Although jellies in the genus Aegina are relatively well known, they often surprise scientists by evolving unusual forms or colors in deep water.⁠
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A surprisingly large proportion of these gelatinous marine animals have yet to be named and classified because they disintegrate when collected by traditional sampling tools like trawl nets. MBARI’s remotely operated vehicles allow us to make video observations that provide essential information about the animal’s behavior, where it lives, and what it eats. This little jellyfish has been frequently observed eating much larger comb jellies.

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Follow ➡️ for more ocean and marine wildlife facts and education. 🌎🌊🐋

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PO BOX 940
Haleiwa, HI
96712

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