Rare Shark Filmed in Japan

[TheBORG] writes "A Deep Sea Frill Shark, whose normal habitat is between 600 and 1000m, was found and filmed off the coast of Japan recently. Normally they're caught (found dead) in fishermen's nets. This 'living fossil' was probably so close to the coast because it was sick. In its poor condition, the shark was moved by marine park personnel to a seawater pool where they filmed it swimming and opening its jaws. The shark died a few hours later after being filmed."

Comments

1000m?

[COMON$]

Correct me if I am wrong but humans can go a bit deeper than 1000 feet as mentioned in the article.

http://www.ussubs.com/faq/luxury.php3 a small deep submersible could be carried "piggy back" by the Seattle, allowing a small group of 2-3 people to board the deep submersible through a transfer lock and dive to depths of up to 3000 meters or more.

Re:1000m?

[Anonymous Coward]

1000m is Meters, not Feet. About three times the distance you were thinking.

Re:1000m?

[Matt Edd]

From the link provided:

7. How deep can the submarine dive?

The Seattle 1000 is designed to dive to 305 meters, or 1000 feet. This is an optimum compromise that allows exploration at significant depth but also allows us to have very large viewports for exceptional visibility. If necessary, a small deep submersible could be carried "piggy back" by the Seattle, allowing a small group of 2-3 people to board the deep submersible through a transfer lock and dive to depths of up to 3000 meters or more.

Re:1000m?

[Nos.]

Wow, a little research, and I found this: http://en.wikipedia.org/wiki/Bathyscaphe_Trieste.. . deepest dive, at almost 11,000m. That's impressive.

Re:1000m?

[FridayBob]

They mean humans with SCUBA equipment subjecting themselves to extreme ambient pressures -- not diving in submarines. Deepsea submarines have taken man to the very deepest parts of the oceans (about 11,000m), but the record for technical diving with special SCUBA equipment is 318.25m: a record set by South African Nuno Gomes in Dahab (Sinai, Egypt) in 2005. Such dives are very dangerous and require careful management of multiple gas mixtures composed of oxygen, nitrogen and helium (trimix) to prevent problems like nitrogen narcosis, oxygen poisoning and decompression sickness (the bends). Deep dives like this also last so long (Nuno's dive was over 12 hours) that lots of other problems, such as hypothermia and dehydration, have plenty of time to develop.

The deepest simulated dive is 685.5msw (meters of sea water) set at Duke Medical Center (Durham, North Carolina) by three divers in 1981. In cases like this, HPNS (high pressure nervous syndrome) is the limiting factor. HPNS is a syndrome of neurologic dysfunction with symptoms that include tremors, dizziness, vertigo, nausea, visual distortions and altered sleep. Tremors associated with HPNS have been reported as shallow as 128.72msw, but the deeper you go, the more likely HPNS is to occur. Eventually, it can prevent a diver from performing essential tasks during a dive.

Knowing this, you have to admire those sperm whales: mammals that are believed to be able to dive as deep as 3,000 metres and then go hunting for food at that depth!

Re:1000m?

[Anonymous Coward]

Well , the article is talking about meters. You are mentioning feet.
1000 meters are roughly 3000ft.

Even though one can dive around so deep , it is still a lucky incident to find any animal on an excursion like that.

Hartmut

Video shot of the shark

[Pippen101]

http://youtube.com/watch?v=Qz_nZixWX6Q Youtube video of the shark

Probably an earthquake

[coalrestall]

The part of Japan it was found has a narrow gulf on a plate with some very very deep water. It's not unusual after an earthquake for all manner of freaky sea creatures to surface, apparently fleeing the depths.