Today our session
was spent making observations of sea life in the field where we learned that
just like with people, there is so much more than outer appearances that
comprise a thing, that one must get below the surface with a critical and
inquisitive mind in order to get to know what is really happening.
Scientifically Loitering
We arrived at
the edge of the Boston Harbor at nearly low tide. The winds were calm and the
temperature was warm, probably 80°, when we started our observations. There
were just a few wispy clouds in the sky and it was decidedly humid. We observed
several species of creature in the intertidal zone, most notably, a seagull
feasting on two green crabs. Attached to the harbor wall we saw long strands of
dry and dark green rockweed. The rockweed has long arm-like tendrils with tiny
"poppers" at the end of each strand. To me, the way that the rockweed
splays seemingly randomly in various directions resembles the movement at the end
of a mop scouring a kitchen floor. Since rockweed grows only in clean and
nutrient rich waters, its presence is an indication that the harbor is
thriving. We looked it algae growing on various surfaces. The algae was visibly
dry, light green and very short, similar to the very short grass that might be
found on a golf tee. Looking around at the different swaths of algae, it became
quite noticeable that different portions of algae or the then dry harbor walls
are at different stages of development. On the beach, we saw small rocks, sand,
and sediment. Under the water, large growths of green seaweed were visible. On
the beach, the seaweed looked dried-up seemingly dead. However, we learned that
once the tide comes in, the seaweed will “come back to life." As we walked
down the pier, we noticed some green seaweed that was very well developed.
However, just a few feet away, some identical seaweed looked not quite so well
developed, an indication that the sunlight helps the seaweed to thrive.
Good Morning
We enjoyed a
great example of the activity below the surface when we saw people feeding
striped bass with chunks of stale bread thrown down on the murky water. From a
distance, the fish appeared to be roughly 18 inches long with three or four
dark brown vertical stripes running from one end to the other end of the fish.
The striped bass would come to the surface just long enough to snatch a piece
of bread before, quite violently, plunging below the surface again.
On a small private
finger pier and shortly thereafter at the Barking crab, we did our first
hands-on observation where we got our hands wet. First we watched a rope being
pulled out of the water which was covered with invasive crustaceans. This was
the most colorful thing I saw all day as it was a jumble of sea life: some of
that moving and some of it not. It looked like a great tangled mess of multicolored
electrical cords and small pieces of brightly colored clothing. Attached to the
pier pilings, a student with sharp eyes pointed out some Sea Stars. My eyes
could just barely make them out but they appeared to be about the size of a
saucer from below a teacup. They were light brown and attached to the piling:
unmoving.
Team Lunch
Our team
focused on several different life forms, primarily in the calm and relatively
clear water surrounding the piers behind the Barking Crab. I could see clearly
below the surface for the entire length of my arm.
The Blue
Mussel: About one and a half inches long and 1/2 inch wide. Subtle ridges about
1/16” apart running along the length of the mussel from end to end. The muscle
was closed and I made a mistake because I did not think to pull it open in order
to see what lives inside.
Bay Barnacle:
We studied two Bay Barnacles which were attached directly to the blue muscle.
The barnacles have an ex cut through the top of each. The tops were open and
folded back in triangles. The barnacles were off-white in color and coated in algae.
The barnacles had a crusty hard texture, as one would imagine of a Barnicle.
Each barnacle was about half the size of a Tic-Tac breath mint.
Bushy Red
Weed: We found what we believe to be Bushy Red Weed. Under the water where it
was attached to the pier piling, it looked healthy and ever moving. The color
was a dark purple. The weed consists of thousands and thousands of fibers that
look like a disorganized spider web. While scrutinizing a photograph later in
the day, I noticed some sort of creature living in the weed that I have yet to
identify. It is gray in color and looks like it has a shell. I can see eyes on
what would be its head and a spine running down the middle. I imagine that it
is about ½ inch long. Perhaps it is a shrimp of some sort.
Golden Star Turnicate:
We saw a fair amount of this invasive species coating many different things in
our observation areas. We peeled it off on of our muscles. We also found it consisting
of two different colors: a vivid orange and a more muted brown color. True to
its name, the Golden Star Turnicate has hundreds and hundreds of tiny, almost
microscopic, stars that may be best viewed with a magnifying glass. What at
first looks like a solid orange mass is actually gelatinous looking and
see-through except for where the stars are. On the underside of a portion of the
Golden Star Turnicate we were able to see where it adheres to various species.
It almost looks like little tiny barnacles on the underside of it. It is easy
to see why the Golden Star sticks so well to whatever creature it sticks to
because it looks very much like it has little suction cups all over the bottom of
it.
Morton’s Egg
Cockle: We found a small white shell with nothing inside of it. We looked
through the book and tried to identify it. The shell is small and white. It is
about the circumference of a nickel. It has ridges going across the entire
surface. We looked through field guide and came to a consensus that it is the
Morton’s Egg Cockle
Sea Lettuce: The
sea lettuce was a fascinating thing to behold. It was bright green and lay out
in ribbons somewhat like ribbon candies that one would find at Christmas. It
was coated with insects or bugs of one form or another that we made a solid
effort at identifying. We also found some red sea lettuce that at first we
thought was a different species, however, it appeared to be attached to the
green sea lettuce and merely a variant.
Sea Pill Bug:
We believe that the inhabitant we found on the Sea Lettuce was the Sea Pill Bug.
As described in our book, it was 3/8 of an inch long, and rolled up in a ball
when we manipulated it. Through magnifying glass one could see dozens of tiny
legs, antenna, and a tail. Its color was light brown and somewhat translucent.
Ascophyllum
Mackaii (Rockweed): We saw an abundance of Ascophyllum Mackaii during our
observations today. Near the Barking Crab, we found them attached to a blue hose.
We found great long tendrils of this plant replete with poppers at the end of
each strand, as well as some poppers midway. Upon closer inspection, each
strand of the rockweed had a vein running down the center of it. This specimen
appeared to be well developed, as there were multiple poppers at the end of each
branch.
Below the Surface
It seems that
our research could have gone on for days. Although we only focused on seven or
eight different species, it became clear to our team that there are probably
thousands of species around that dock. This observation gave me a new awareness
of the richness that lies just below the surface of all things.
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