Thursday, December 15, 2016

Low Tide at Crab Cove: Splash Zone

Exposed Branching Bryozoan
I walked along the edge of Crab Cove last night during a substantial minus tide.  When I arriived, about 5:30 PM, it was dark.  In a narrow band along the landward edge of the concrete walkway the water pools, among rocks of various sizes.  along the seaward edge is trapped a very narrow and shallow line of water; along one part I find a branched bryozoan, exposed but we  t enough to possibly be alive.  I am searching for hydroids.  None will reveal themselves this evening.

Looking back toward the visitors center
Along this narrow band, I was experimenting with the camera.  I have a selfie stick that I hope to use for photo transects along the mudflat, but in this darkness I am reluctant to try it.  The selfie stick is capricious, depending on the camera app I employ and the settings, so it requires further experimentation before trying this in the field, on the mud.  I am wearing my mud boots, but tonight I will not walk out onto the mud; the only other time I did so in these boots, it was also dark, and I got stuck in the mud for a brief time.  Neither am I experimenting with the macro attachment lens.

Along the edge is a railing.  It is possible to kneel with one knee on the lower rail.  Many amphipods and isopods are scudding about, and insects are around.  I take some random shots, found a few insects.   A large limpet had emerged from a small crevice, where some conspecifics were still ensconced.

Some denizens of the splash zone

An invasive Bryozoan (arrived in the 40's)

A Bryozoan appearing to be Cryptosula pallasia.

 In the field (photo at night)

In the bowl

In the microscope

The shape of the Aperture appears to conform with Cryptosula pallasia. 

Camoflaged, a Scale Worm. 

 A Scale worm

This might exhibit light flashes.  Something to check.

An unidentified insect

An unidentified insect, and some other critters.

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