Monday, 25 June 2012

How do 0.7 m/sec sharks eat 1 m/sec seals?

The BBC reports:
Researchers have measured the swimming speed of the ocean's slowest shark.

Data-logging tags revealed that Greenland sharks "cruise" at 0.34m per second - less than 1mph.

The study showed that, even when the languid fish embarks on a burst of speed in order to hunt, it is far too slow to catch a swimming seal.

Since the species is known to eat seals, the scientists think it probably "sneaks up on them" as they sleep under the water.
It won't make exciting Animal Planet footage, I guess. More details at the BBC website.

Curious, I had to look for a video. Up popped this video from April:

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