Seward Sporadic Beach Report
Interesting find at Lowell
Point Beach today, the front half of a Longnose Skate, Raja rhina. This is a
poorly understood species that ranges from southeastern Bering Sea south to
California. What an amazing, streamlined nose! The skin was like sandpaper, but
only rough in one direction. The mouth, on the underside of the body, had rows
of tiny teeth. I wonder what happened to this cartilaginous fish?
We also found several
"Mermaid's Purses" which are the egg cases of skates.
They looked gold-plated on the
smooth and lustrous underside. The fibrous upper side was full of camouflage to hide
the developing skate. The curved hook at each corner helped attach the egg case
to algae or the ocean floor. As the baby skate got ready to emerge, a hole
opened at the tip of each hook, allowing seawater to flow through and let the
baby get accustomed to the chemistry of salt water. Finally, a long seam opened
at one end of the case and the baby slipped out, unfurled its long wings and
flew off into its undersea universe.
It seemed like these cases
were empty, so it could be spring for baby skates.
Another fascinating beach
find was a marine isopod, a jointed crustacean with large compound eyes and
many jointed legs. It looked prehistoric, and indeed it is. Sprinkled down the
beach were a few Euphausids, also called Krill, food for whales in larger
quantities, and birds. They seem to wash up on our local beaches around the
last part of March and first part of April. When fresh, they taste like shrimp.
It's just incredible what lives
under the sea, so close to our world, and yet so mysterious, unknown, and
inaccessible.
Happy beach combing!
Carol Griswold
Seward Sporadic Beach Report
Reporter
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