Posts Tagged 'Diving'

Scientific leisure diving

From: coral-list-bounces@coral.aoml.noaa.gov on behalf of Nathan T. Schwarck
Sent: Fri 1/26/2007 7:19 PM
To: coral-list@coral.aoml.noaa.gov
Subject: [Coral-List] American Academy of Underwater Sciences AnnualSymposium Invitation

All persons interested in underwater sciences or scientific diving are
invited to attend the American Academy of Underwater Sciences Annual
Symposium. This year’s symposium is hosted by the University of Miami’s
Rosenstiel School of Marine and Atmospheric Science in Miami, Florida; March
5-10, 2007. Scientists, Dive Safety Officers, students and diving
technicians are invited to contribute and present papers or posters
describing recent research, underwater research diving techniques and
technological developments related to scientific diving.

Hmm… This is typically the sort of symposium that people attend who always find an excuse to get paid for diving under the guise of science. Er… like me. But I won’t go; I seriously don’t think the international scientific diving community would appreciate my way of “scientific diving”, you know, like getting 24 cages of 20kg each up and down all the time on my own, or diving alone with someone snorkeling at the surface for “surface security”, or getting arrested for not having a diving flag marking the boat (that was cool! My first time taken into custody!). I’m actually quite lucky I’m a marine scientist in Belgium: the expensive “Scientific Diver Certificate” is not required here, but it is elsewhere, and it is almost always required to attend an international expedition. However, the reality of low-cost field research in the middle of nowhere differs enormously from the neat scientific missions organized by wealthy laboratories or research initiatives… And sadly, there’s no session on low-budget scientific diving in the symposium…
Anyway, if I get to dive again in Oman in the framework of a monitoring contract, I’m sure decent logistics and support in the field will also be assured, to the relief of certain people staying at home :-)

Okay, enough cowboy-talk, to reassure you: I don’t do this kind of “rodeo-diving” deeper than 5m anyway, so there’s no need to worry.

The deep blue *boo!* effect

It was on the news the day before yesterday: a “prehistoric” shark normally living hidden away in the depths of the ocean off Japan came up to the surface and, unfortunately, died. Scientists recognized the species, although from 80 million year-old fossils instead of live specimens. A schoolbook example of a “live fossil”: If the environment doesn’t change (and it almost doesn’t, at that depth), there’s no need for obvious evolution. Anyway, the footage looks terrifying (just as one would imagine a prehistoric marine monster), and frankly I wouldn’t have had the guts to almost put the camera in its mouth, as the maker of this videotape did… To list the freakiest close encounters I experienced diving in Oman:

3. Giant Green Turtle emerging from tons of accumulated dead macroalgae at the bottom. It’s usually quite turbid and a bit dark above the dense algal packs at about 10m depth due to the decomposition, and turtles hide in there completely for shelter and feeding. When you’re swimming right above the algae, sometimes turtles emerge because they’re scared and swim away. Although you know what a turtle is and that it’s completely harmless, it scares the hell out of you when a creature the size of you suddenly and unexpectedly appears right in front of you. They swim away so quickly I never had the chance to capture such a moment on camera.

2. A Teira of almost 1m height pops up right in front of your face out of quite turbid waters. It was very inquisitive and followed us for quite some time. At that time I had no idea at all what it was and I didn’t know it was harmless. The picture was taken after I’d drawn my knife in a reflex and I’d put it away when I was at ease a few minutes later. The thing is, as with the turtle, under water you see everything one third bigger than it is (due to the optical properties of water), so I had the impression of looking at a fish that was 133cm high.

1. Fantail Stingrays of about 180cm disc diameter (already more than I am tall!) and 300cm overall length – no need to explain how one perceives that size under water. There’s one bay in the south of Oman we visit each time where you’re guaranteed to see several of those at any given time. Already the first time, 3,5 years ago, I didn’t dare to approach these “monsters” closer than 10m. Over time, I got used to them, but it still frightens me when they suddenly arise from the sand where you didn’t see anything before. And when you did, it’s probably because you saw the eyes or the tail first, and it always takes a few moments before you’d find the other end and realize its full size. Last time I saw them was actually exactly two weeks after Steve Irwin, the famous Australian “crocodile hunter”, got the venomous spine right through his heart while swimming above a stingray like this to film it; he was killed almost instantly…

Blue

With these cloudbursts the last few days, all I can think of is putting on my wetsuit and diving…
As we dropped anchor in the bay of Komiza on Vis island in Croatia, the two dive centers located at the waterfront immediately caught our eye and we just couldn’t resist the appealing wreck dive offers. It wasn’t cheap, but a good deal seen the quality of their offer. We dived on the wreck of a steam ship carrying cobblestones, which crashed in a narrow passage between two islands (which we passed the evening before under spinnaker sail, taking over two other yachts as we did, and indeed we had to keep full attention to avoid the shallow zones). The steam ship lies between 10 and 34 meters deep in amazingly clear and blue waters. Of the approximately 100 dives I’ve made, this was the deepest, and apart from the five training dives, the only one outside Oman and hence the first one in the Mediterranean, and merely my third strictly recreational (non-scientific sampling) dive! You bet I enjoyed it, and I’m still sorry two other dives on natural drop-offs at the Kornati islands were cancelled due to overbooking…
An additional video fragment can be downloaded here.
Rays of sunshine lure one down Unfortunate octopus “Gee, some dude seriously messed up here…”
Strange, yet peaceful combination of two worlds Deeper and deeper Sponges have taken control
Bottom line

Mitigation measures

As a matter of compensation for the last two posts without pictures, let’s make it up to you with a few underwater macro piccies as a starter. Two nudibranches (marine snails without a shell and with bare branches visible in a bush, hence: nudibranches) grazing away beautiful algae (by which they obtain their own beauty, naturally ;-) ), served between a tiny crab living a hidden life between coral branches, and of course, a well-known little fellow.





For your information, I was actually playing underwater tourist instead of assessing algae out of diplomatic reasons: I was asked by the environment and safety engineer at the fertilizer plant to provide him with some pictures and ideas on an exhibition concerning marine life in front of his plant. And as I will tell you later, I had all reasons to cooperate.

Find the deadly poisonous Scorpion fish in the quadrat


Shifting question: did the author manage to discover this specimen in time before he was going to take some interesting algae of its back? If so, how many seconds before doing so?
Send your answer by e-mail. The winner stays alive.


Welcome to Klaas’ website

On these pages, you'll find information about my professional life and sea-related leisures. My blog isn't as regularly updated as I would like, but it's where I tell you about some memorable moments while out on expeditions or where I describe some great activities or research ideas in between. You can contact me at klaaspauly (at) gmail (dot) com.

 

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