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‘Killer ‘Jack Mackeral on the Attack…..
Jan 29th, 2009 by Mikey

Deep Night Dive: Attack of the Killer Kamikaze Fish….
Jan 29th, 2009 by Mikey

Date: 1/28/09

Location: Vallecitos Pt., La Jolla Shores

Time: 8 pm-ish
Dive Length: 43 mins
Max Depth: 138 ft.
Viz: pretty good at depth: 15 ft. +
Dive Buddies: Jackie, Merrianne and Kathy B.
Marine Life: Numerous Sculpins, Jack Mackerel, Octos, Horny-Headed Turbo, Sheepcrab, Hemphill Crabs, Cusk Eels, Swimming Crabs, Round Rays and baby Thornback Rays…
Remarks:
So, the usual gang showed up at V-St. and we broke up into deep vs shallow divers: Merrianne and Kathy decided they wanted to stay above 100 ft. and check out Zion and Jackie and I decided…….well, we just wanted to…ummm…. get narced, OK? I’ll admit it.
I had heard she had been complaining lately about some divers ‘cramping her style’ and so, I deliberately went and got a 27% mix and set my PPO to 1.5 so I’d be ready for anything. I’m glad I did!
We all kicked out to about 40 ft. under a beautiful orange sliver of a moon hanging in the night sky and dropped…..the ‘plan’ being to try and hit Zion on the way down. I remember passing Zion, but only briefly. Initially, I landed on the bottom with no dive buddy, then gently made my way back up to the surface, to find Jackie adjusting some hair in her mask, and with that done, we dropped back down and began the dive.
At around 40 ft., we all found ourselves in a detritus pit and began making our way Westward and down.
We passed numerous orangish-red Sculpins s peering out from the kelp detritus on the way down, along with the occasional octo and lobster. I got one lobster to cling to my forearm for a bit, until he tired of my company and leaped off.
We continued following the detritus pit down past 80 ft., 90 ft. and 100 ft., where I briefly remember seeing Zion go by.
As Kathy and Merrianne leveled off and headed South, Jackie and I just kept right on going: 110, 120, 130…….I remember thinking, ‘Gee, I need to take my reg in for servicing, it’s beginning to taste a bit rusty….’ Rusty? Uhh…..right.
Right at around 135 ft., all of a sudden, out of nowhere, these blue-ish bullets about 5-6 inches long began coming out of nowhere and ricocheting off our bodies at fairly high speed……..turns out they were some type of Jack Mackerel, if I’m not mistaken.
Anyway, given their size and speed, when they collide with you, it hurts, lemme tell ya!
They grew more and more numerous, until there were literally dozens of them, hurtling at us from all different directions and bouncing off our bodies like bullets.
We put up our arms to shield ourselves, but it didn’t seem to help much………they just kept on coming and coming from out of the darkness.
We figured our lights were both attracting them and disorienting them………actually, we probably should have turned them off and the attack would have slowed or gone away, but I wasn’t about to turn off my lights at 135 ft., at night, thank you very much!
Finally, after a few minutes, they began to thin out, and the ‘attack’ began to wane a bit, so we continued West.
At around 138 ft. the ‘rusty taste’ in my mouth began growing stronger and it felt like I could feel every square inch of the 4 atmospheres of pressure on my brain, so I figured it was time to turn around, so I signaled Jackie and we began making our way slowly Eastward and up.
On our way back up through the detritus pit, we passed more octos, out for their evening strolls as well as quite a few lobsters.
We would take turns ‘shooting’ lobsters at each other, which is actually something of an art. Sort of like that old game of Tiddly-winks, but with bugs.
You have to make sure the lobster’s…..ummm….’butt’ [OK: 'tail'] is facing your buddy. Then, you tickle him under the chin, until he decides he doesn’t like it any more and he zooms, or ‘shoots’ over in the direction of your buddy.
Now, I can tell you from experience that if you’ve ever had a lobster ‘shot’ at you, you better be able to duck fast, because they are faster than a speeding bullet underwater.
And, if you fail to duck in time, then, are struck by the speeding lobster and immediately begin plotting revenge against the ‘shooter,’ and the pattern repeats itself all over again, until you run out of lobsters to ‘shoot’ at each other.
Opinion: this is less cruel than eating them. :)
We made our way slowly ‘upslope’ along the canyon walls.
We passed some more kelp where I spotted some really cute little Hemphill crabs, with their little frilly ‘costumes’ waving in the breeze.
It seemed to take forever to make our way uphill, because we were crawling at a snail’s pace, which is wise at these depths……I hadn’t seen this much deco on my computer in a dog’s age….yikes!
Finally, we ascended up to the rim of the canyon, around 40 ft. or so and ran into a strange blizzard of what appeared to be ‘silvery’ sand particles all around us. In over 8 years of diving the Shores, I don’t recall ever seeing these silvery particles before.
Anyway, the blizzard of ‘silver’ particles followed us all the way into the shallows, where we came across some really cute, baby Thornback Rays, about 4 inches long, scooting along the bottom.
In the silvery blizzard, I also almost put my hand down on Mr. Stingray, who darted out of the way at the last minute, to avoid inflicting some nasty karma on me. He seemed to glance back at me, as if to say, ‘Watch it, buddy!’
We continued on through the shallows, slowly off-gassing, until we were in 3 ft of water, where we surfaced and both started babbling at the same time about what a great dive it was.
Jackie was cold, but not as hypothermic as usual, but that’s all about to change…[wink, wink....]
Merrianne and Kathy surfaced about 15 mins later, also having had an excellent dive.
Great dive, everyone!
Let’s do in again……in…ummm……..about a week, shall we say?

Dive safe, everyone……….

Statement by Dr. Paul Dayton on the Yukon
Jan 27th, 2009 by Mikey

Note: this was related to a recent discussion of the role of the artificial reef Yukon, off Mission Beach, on the Divebums list, which I have not been featuring here, but I thought it might be of interest, once the context was explained, which is that of the Marine Life Protection Act [MLPA].

*******************************************************************
A week or two ago there was a discussion on the Divebums email list about artificial reefs (such as the Yukon) and how they might or might not fit into Marine Protected Areas (MPAs) as part of the California MLPA process.  Several people made reference to Dr. Paul Dayton from Scripps Institution of Oceanography and the concept of artificial reefs as “killing zones.”

Dr. Dayton asked me to post the following statement from him back out to you all, in response to those several emails.

A couple pieces of context:
SAT = Science Advisory Team (for the California MLPA)
Ed Parnell (PhD) is a researcher in Dr. Dayton’s group at SIO

About Paul Dayton:  http://sio.ucsd.edu/Profile/?who=pdayton

PLEASE NOTE that he is only addressing the issue of whether artificial reefs such as the Yukon are killing zones and is not addressing the larger issue of the role of such sites in the California MLPA or in MPAs in general.

===== STATEMENT FROM DR. DAYTON =====

First, I am on the SAT for the MLPA and my understanding is that it is not appropriate for me to be involved in any discussions about specific MLPA issues, but some of you have already mentioned my two decades struggle to protect some habitats for future people to enjoy and learn from natural habitats.  I have also long advocated protecting examples of the best habitat and when possible not restrict the most intensive use.

But just for the record regarding artificial reefs and sunken ships, I can not recall writing a paper calling them killing zones, but I have discussed that term and in the beginning I did worry that they attracted fish that were otherwise rare where they were much more vulnerable to being killed.

However, the San Diego Ocean Foundation asked Ed Parnell to help them study that issue with what was really an excellent program on the Yukon.  There were a lot of divers and a huge amount of effort and Ed did a terrific job analyzing the data and the very brief take home message is that almost all of the fish that were around the Yukon had settled on the ship as larvae.  So if we think of the ship as a sink for larvae it seems unlikely that those larvae limit the populations on natural habitats.  Hence the ship attracts larvae at little cost to their natural populations.  Thus simplistically we can consider the ship as a means of enhancing those populations and even if every one of the fish that settled on the ship as larvae are killed, it is still a virtual wash in the big natural picture.  And of course the fishermen do not kill all of the fish, so the ship does enhance the fish populations which is a good thing to most people.

Second, the ship is covered with all sorts of really spectacular invertebrates and in my mind thus serves as a great educational value to divers interested in invertebrates.  I can not think of any down side to this and I consider it a huge positive value.  I just wish more people could be interested in such fascinating marine animals and make an effort to learn more about the natural history of these species.  And the ship vastly enhances the opportunity for those who do care to get out and enjoy some really interesting animals.  To this I plug the wonderful educational outreach efforts by the San Diego Ocean Foundation.  This group really makes a huge effort to expose the public to nature and I can not over-emphasize how very important that is.  And again, the Yukon is a wonderful asset to this outreach work.

The only potentially negative concern that I can not address is the hypothesis that the ship is leaking toxic material such as PCBs.  This could be tested by catching flat fish that live near the ship and would be expected to have concentrated toxins if they exist.  To my knowledge this has not been done because the analyses are expensive.

My personal, and I repeat it is very personal to me, view right now is that the Yukon offers a large positive role within these concerns. I was already persuaded of this at the last Dive Council meeting I talked to at Scripps and I did explicitly mention “killing zones” at that talk but then explained Ed Parnell’s excellent analysis and reported that I now supported sinking ships (within reason) so long as they were cleaned as well as the Yukon.  I emphasize again that it is really important to look for toxins in fish associated with the Yukon.  If there are a lot of toxins I would reconsider my support, but I do not now consider the ships to be killing zones as they cause a lot more larval settlement of larvae that would suffer mortality in the plankton I suspect.

===== END OF STATEMENT =====

More Photos from Saturday’s Yukon/NOSC Tower Dives……
Jan 25th, 2009 by Mikey

More cool photos from our dives Saturday on the Yukon and NOSC Tower, from my good buddy Dave Hershman--thanks, Dave!

–Click on any photo below to ENLARGE…..

Mikey Peers Into the Yukon….
Jan 25th, 2009 by Mikey

Mikey Blowing Bubble Rings….
Jan 25th, 2009 by Mikey

Giant Spined Sea Star Orgy…..
Jan 25th, 2009 by Mikey

Mr. Big in His Pipe…
Jan 25th, 2009 by Mikey

Mikey Sittin’ Over the Yukon: "Well? Are You Just Going to SIT There?"
Jan 24th, 2009 by Mikey

Look….Over There……It’s A Great White! [Just Kiddin'...]
Jan 24th, 2009 by Mikey

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