3) Bahamas Biennale Presents: Horseshoe Crabs Horseshoe Crabs

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3) Bahamas Biennale Presents: Horseshoe Crabs Horseshoe Crabs
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SPF15 says
From the Press Release:

Don’t let its hard exterior fool you. The
horseshoe crab is actually quite a sensitive
creature. This invertebrate uses a system of
specialized nerves that extend from the brain
throughout the body. Several large nerves
supply the crab with information about its
surroundings, including two optic nerves and
eight pairs of hemal nerves that are spread
throughout the body.
An interesting feature of the pusher leg is the flabellum, an organ that tests the
composition of the water passing to the gill chamber. There are approximately one
million sensory cells in this organ alone.
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