When Dennis let me know he was heading south for ʻAuʻau Crater and that I was invited I didn’t even think about it… I’m in! When do we go?
The furthest south I had been diving along the coast is the Red Hill area. The dive sites there are good, some of the best I had seen. The snorkeling at Kealakekua, even further south, is spectacular. I had read descriptions of the diving at ʻAuʻau, and had really wanted to see for myself.
It is a long drive past Kealakekua Bay to the ʻAuʻau Point area. As such we left Honokohau much earlier than usual, ready for a long day of diving. ʻAuʻau crater itself is visible on the shore, a classic littoral cone formed where lava met water and created an edifice much like a cinder cone from the resulting hydrothermal explosions. The cliffs are pocked with sea caves, many small, and some huge, large enough for us to drive the boat into on a calmer day.
The first hint about the site was the amazing glimpses of the terrain you could see from the surface as we crossed the area looking for the mooring. Boulders and coral 30 feet below us one moment, then nothing but deep blue the next. This site has a wall! Not just a little twenty foot wall as you see along the Kohala Coast. A sheer wall that we could not see the bottom of while we hovered at 100 feet. The wall just drops into the depths, inviting you ever further down into oblivion. On 32% EAN nitrox we dared not venture any deeper. This thing is at least 200 feet high, probably much more.
The wall is a mix of volcanic rubble, in places you can see layers, but mostly it is remnants of thousands of years of lava flows hitting the sea and creating sand and fragments of rock. On the ledges and in the little cavities life flourishes. Urchins and sea stars roam, but there is relatively little coral. This unstable surface is a poor place for the hard corals to colonize. One exception is wire coral, meter long specimens protrude here and there.
For our second dive the choice was The Hive. Arriving at the site revealed a small sea arch adjacent to the mooring large enough to drive the boat through. We did not know what to expect at the site. Thus the dive plan was to make a sweep out the edge of the reef and then back towards shore to check out the sea arch for possible caves. The sweep was pretty routine, a steep coral covered slope, nothing to hint at why there was a dive mooring here. Coming back to the arch revealed what was special about this spot! A set of great caves hide right under the arch at 25-30 ft depth. There were lobsters, innumerable flat rock-crabs, and several species of nudibranch to be found.
As I thought about leaving the caves after a first sweep I looked at my gauge… Still a thousand PSI in the tank! I turned around and headed back into the cave to find still more.
Entering the cave I immediately noted a Spanish dancer I had swum right past earlier. Looking through the large boulders at the entrance I found a few blue dragon nudibranch, always a pleasant find. Dennis was trying to get my attention from a few feet away. I insisted that he look to see what I had found, a blue dragon. When I looked to see what he was pointing at it was another blue dragon. They were everywhere, I lost count, it was just a matter of finding one better situated for photography.
We surfaced, a set of very happy divers, conversation buzzing as we compared notes. Diving has an interesting complication… Communication is limited underwater, you have to wait until you surface to ask questions and compare notes. We identify critters, sometimes grabbing the ragged and well used books Dennis keeps aboard to identify some rarity. We find out what others saw and what we missed. Through the conversation the dive is extended as we relive it one more time.
These are some of the most fantastic dive sites on the island. Not easy to get to but worth it. There are very few boats that run this far south, most vacation divers are happy with the dive sites near Honokohau and the boats need not venture very far from harbor. Jack’s Dive Locker runs a long range dive if there is sufficient interest. The Kona Agressor live-aboard is the only boat that regularly calls at these sites. The very occasional private boat like us is the only other practical way to get to these fantastic dive sites.
As Sky kicked past me he stirred up a cloud of silt in the cave. A moment later he realized I was there and was taking a photo. He apologized with a sheepish shrug, understanding the dirty look I was giving him. The cave wall was host to a dozen or more nudibranch and I was busy with the camera. There were gold lace nudis everywhere I looked, a couple white margined nudibranch added for variety.
As the silt settled I noted a larger object kicked up in the cloud. Closer inspection revealed an odd looking nudibranch floating down and settling on the algae covered rock. This was a new species to me! I took more than a dozen photos as the little slug crawled along. On consulting the book I was unable to locate a good match for this species, always a surprise, Hoover covers all of the common species.
It took a little more work to finally properly ID the nudi. It is a transparent nudibranch (Plocamopherus maculatus). I found it listed on Keoiki Stenders site, but the photos were not convicing. Once I had a species name I found it on Sea Slugs of Hawaii and in the website additions to Hoover’s book, where the photos are much closer to the specimen I found.
Back on the surface I told Sky about the nudi, letting him know that he was somewhat redeemed in revealing an interesting find, despite the cloud of silt.