Ni’ihau: A Haven for Hawaiian Sea Life and an Inspiration for My Research

In the first week of summer, I took a trip to Ni’ihau to complete some dives. Ni’ihau is the 7th largest Hawaiian island and 18 miles south of Kauai across the open ocean. Despite that small distance, Ni’ihau is a haven for sea life, especially the endangered Hawaiian monk seal, with more seals in that island’s waters than all the other main Hawaiian islands combined. During our dives on the adjacent submerge crater islet of Lehua, that abundance was very noticeable. For instance, after 3 dives we spotted 8 different monk seals, a truly spectacular number. Other members of our group even saw two large male seals sparring aggressively underwater!

I hope to replicate zones of safety like Ni’ihau on a smaller scale with my research, allowing sea life to thrive. My dives inspired me to work harder to achieve my goal and reminded me that there are still healthy ecosystems to protect.

The crescent islet of Lehua, located just off the northern coast of the “forbidden” island of Ni’ihau.
In the first minute of our first dive, a large sandbar shark cruised out of the blue and right past a sleeping monk seal.
The monk seal was not bothered by the shark at all!

Monk seals were everywhere…wait for my reaction at the end of the video ;)!

Our group even saw two adult male monk seals fighting!

Clouds of butterflies, tangs and triggers on a wall.

In such clean water, the macro hunting was excellent.

There were herds of nudibranchs, like this pair of scrambled egg nudibranchs.

Dozens of strawberry nudibranchs.
This pretty tiger flatworm was happy to pose for a picture. I was also lucky enough to get a very rare daytime sighting of a Spanish dancer nudibranch! We weren’t able to get a picture, but I’ll never forget it.
I also can’t wait to go back!

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