Giant deep sea fish .wmv
1:54 February 08, 2010
Science & Technology
ludvan64
Extraordinary footage of a rarely seen giant deep sea fish has been captured by scientists.
Using a remotely operated vehicle, they caught a rare glimpse of the huge oarfish, perhaps the first sighting of the fish in its natural setting.
The oarfish, which can reach 17m long, has previously only been seen on a few occasions dying at the sea surface, or dead washed ashore.
Using remotely operated vehicles (ROV) provided by oil and gas companies, the scientists are able to explore the deep like never before.
During one of these surveys, the scientists glimpsed a giant oarfish
Oarfish (Regalecus glesne) are one of the world's longest fish reaching 17m.
Their strange appearance may have provided the basis for the sea serpent myths told by early ocean travellers.
Not only are they elongated, they also have a prominent dorsal fin which gives it an unusual "serpent" appearance.
Recalling the event Professor Benfield explained how at first, they thought the fish was simply a drilling pipe called a riser being lowered into the water.
"We saw this bright vertical shiny thing, I said 'are they lowering more riser?' as it looked like they were lowering a huge pipe."
"We zoomed in a little bit and we said 'that's not a riser that's a fish!'"
"As we approached it retreated downwards swimming tail first in a vertical orientation as the ROV followed," Professor Benfield explained.
The team followed the fish for about five minutes before breaking off contact to resume their surveys.
"What was interesting about the fish was its swimming behaviour," said Professor Benfield.
"It moved by undulating its dorsal fin in waves that propelled it backwards at quite a good speed."
Early estimates measure the fish at between 5m and 10m in length.
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