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Posted by Merry on October 24, 2011 at 22:45:18:

In Reply to: Re: Who turned out the light? posted by Andy S on October 24, 2011 at 21:36:35:

Last March, I collected a sample of "red tide" about 1/2 mile off the Redondo Beach breakwall. To my surprise, it contained at least 7 different species of dinoflagellate. The sample also contained Tiarina fusus, a ciliate which preys on dinoflagellates.

Dinoflagellates were originally classified as single-cell algae. This is a clip of a dino that I photographed under the microscope. Note the 2 flagella which allow vertical migration in the water column - deeper at night to take advantage of nutrients, then moving closer to the surface during the day to photosynthesize.

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