Strongylocentrotus purpuratus sea urchin.
Posted on 02/10/2010 2:01:39 PM PST by JoeProBono
The spiky body of a sea urchin acts as one big, spine-covered eye, confirms a new study that tested how well urchins can see.
Sea urchins, like their close relatives the sea stars (starfish), don't technically have eyes. Instead, the ball-like invertebrates detect light striking their spines and compare the beams intensities to get a sense of their surroundings.
Strongylocentrotus purpuratus sea urchin.
While beautiful, they’re obviously not Republicans.
and what’s he gonna do with that spoon?
uni. yeccchh!
This has been know for quite some time. They’re interesting and amusing reatures. In an aquarium, they show individual preferences and behaviors.
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