Friday Deep-Sea Picture (05/11/07) Jug Handling

One of the benefits of my office being on the shore is seeing this some mornings. The behavior of sticking one fin out of the water is called jug handling.
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More like this

How awesome!! We should all have this outside our windows.

Any idea why they do it?

They do it for temperature regulation. And to just wave HI to the folks at MBARI! Ok maybe just the first part.