A couple of times every year the moon and sun align – literally – to bring about very large tides. In June this year, a full moon delivered a -4.6 tide to Hoonah, Alaska and provided a glimpse of life under the sea. Rocky shorelines were converted into tide pools full of life trapped there by the receding waters. The first time I experienced one of these monster tides was in May 2016 right after moving to Hoonah. The joy I find in perusing the beaches and flipping rocks to see what is beneath has not diminished since that time. Thanks to Bob Armstrong’s guide, I am able to identify some of the creatures we found.
The Star Fish
Of all the animals in a tide pool, Sea Stars seem to provide the most variety to the color, textures, shapes, and sizes that have evolved in the ocean. In some places they cover every rock surface or bottoms of tide pools. They are the ever-present predator scouring for crustaceans, snails, and clams. We enjoyed looking at their colors and touching their rough (and sometimes slimy) skins.
We found the crab shells before we found the octopus den. The tell-tale shells were only a foot or two away from a crevice containing 8 arms with quarter-sized suckers. Th octopus was so large that we could only see one arm, and wait as we might it never came out of the den. Fortunately a smaller octopus – about the size of a football- motored by us. They are intelligent and lithe creates known for their camouflage. It was amazing to watch the colors of the small octopus’s skin turn from a light pink to dark red as it moved from rock to rock and tried to blend in. It was the first time I had watched a wild octopus! The 12″ deep water provided a window into its life below.
Crabs are really remarkable creatures. They have adapted themselves to all areas (niches) of the inter-tidal zone in search of food. We must have found 8 or 10 different species, but some of them stood out for their uniqueness. Spines, claws, and camouflage make them fit for the niche they fill. The most bizarre was the Butterfly Crab – it is hard to imagine what its oblong shell would provide. Perhaps it camouflage?
Bobbin’ Around Under Water
Below the inter-tidal we found this bright orange sponge. This sponge was accessible because of the low tide.
A day spent looking into tide pools is time well spent! Exploration allows you to discover new things, observe new behaviors, and breath in the sea air. I look forward to the next big tide!
The 18+ foot tides of Homer Alaska define life on the seashore. Its consistency and rhythm are the drumbeat of the ocean. During the summer each day, salmon return to the “Fishing Hole” with the incoming and outgoing tide chasing schools of baitfish, only to be chased by fisherman. Shorebirds feed at the tideline and in the exposed rocks which contain many insects and invertebrates in the crevices. Tide pools contained trapped wonders to because observed with curiosity, and which have evolved to survive the temporarily dry conditions. They often closing up, or shrinking under the sand to conserve water. My time in Homer, Alaska was focused around the seashore, fishing, beach combing, birding, and peering into tide pools. These pictures and experiences are both through my lens, and Kassie’s too.
Peer into a tidepool, and what shall you see? Small creatures, shells, or an anemone.
As the tide goes out, large boulders hold water and sea creatures – tide pool!
The tentacles of a green anenome reach for the surface in a a tide pool.
This large, lone, mussel displays one of its unique characterists. The strong, hair fibers of its holdfast which secure it to a a rock.
Within a tidepool I watched this tiny hermit crab discover, and then attempt to pry loose this limpet for dinner. For scale, this tiny limpet is half the size of a dime, and the crab even smaller.
This particular anenome in the tide pool was very striking. Wedged between two rocks, I was able to capture it through the surface of the water!
(1) The sand flats in between the rocks may holder larger treasures….
(2)… like this starfish! This large star fish was 10 – 12 inches across. We moved it to a wetter, and safer tide pool.
This image of a dead clam among the rocks, and surrounded in seaweed seemed to imbibe the whole concept of tidal change to me.
As we walked along the beach a northwestern crow began to dig a hole along the surf line. To our astonishment it jerked out a thin, silvery, and wriggling Sandlance from the bottom of the hole. Hopping forward a bit further the crow did it again, and again. Other crows were doing the same thing, and were apparently highly efficient hunters. I relayed this video (below) to a birding group, and was informed this hunting behavior may be specific to Homer crows. Have a watch, and let me know your guesses on how they locate the eels. I have not a clue!