Tag Archive: extreme tidepooling


Teachers, friends and team builders… Blue Water Ventures offers Extreme Tidepooling along the Central California Coast. The most interesting find yesterday was a pseudoconch, an internal structure of a sea butterfly, Corolla spectabillis. As the name implies this gelatinous pelagic snail can swim rapidly through water to escape predators. Know your tides and never turn your back on the big blue. Come explore, discover and learn with http://www.bluewaterventures.org

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Truly a great find yesterday while tidepooling at Davenport Landing, Octopus rubenscens, the red octopus! Watch closely and you will see that it’s spotted appearance mimics the bits of shell that are adhering to the sea anemones in the background. The spots disappear for a moment and the body develops a deep red hue as it passes over a patch of purple urchins then quickly develops the molted spots as it nears the shell laden anemones again. Incredible.
Octopus are masters of disguise and accomplish their pigment changes using chromatophores,1000’s of color cells that are embedded in their skin. By expanding or contracting these sacs of pigment they can instantaneously alter their color to match their surroundings. They may even morph the texture of their skin to mimic algae, rocks or coral.

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Its been a week of EXTREME fun and exploration with my Clemson graduate school friends, a 33 year reunion! At daybreak, we headed to Davenport Landing for extreme tidepooling. From kayaking among the giants (humpback whales) to intertidal discoveries its been an amazing week!
We found only one healthy ochre sea star (Pisaster orchraceus) spared from the fatal sea star wasting syndrome. Thought to be a virus effecting sea stars from Alaska to Baja, SSWS has researchers along our coast working hard for more answers.

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For more information on sea star wasting syndrome go to: http://news.ucsc.edu/2014/11/sea-star-virus.html.
Join http://www.bluewaterventures.org on a naturalist-led adventure from California to Baja and beyond!

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The Creature Featured today is the Monterey Stalked Tunicate (Styela montereyensis).  Also known as sea squirts,  the tunicates are  more linked to humans than those octopus with clever thoughts,  crabs with their fancy  jointed appendages or  sea hares with their  joy of sex (mass orgies).   In fact, they belong to a group of  animals known as the Urochordates, a subphylum of  phylum  Chordata, animals with backbones.  In their larval form tunicates have  a primitive spinal cord, stomach and heart .  As  free swimming youngsters,  they sport  an appearance resembling  a  tiny  tadpole or human embryo.  As adults, Styela montereyensis claim a sedentary life attached to a surge channel or the  ocean floor filtering plankton through their dual siphons.  Check out http://www.bluewaterventures.org for our next naturalist-led adventure.DSCF36282

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Here’s an unusual find, the internal shell structure of a sea butterfly, Corolla spectabilis. As the name implies this pelagic gelatinous snail can swim rapidly through the water as it escapes its predators. To feed, it oozes a muscus snare to capture its planktonic prey. We found this while exploring Greyhound Rock. Winter offers excellent tides that may reveal unusual sea creatures.
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To learn more about this interesting species found in Monterey Bay National Marine Sanctuary check out: http://jellieszone.com/corolla.htm

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Join Blue Water Ventures as we explore the incredible  diversity of California’s rocky intertidal.  Wetsuits are recommended to “go extreme” in comfort as we scramble along the rocky nooks, crannies and caves of our coastal waters.

 
This is a great outing for groups or schools  looking for an adventurous and  informative day with a naturalist guide. You will learn about  the amazing adaptations of our intertidal inhabitants such as the feeding habits  of sea stars and the mating strategy of barnacles.
 
Contact Kim Powell, Owner at: bluewaterventures@sbcglobal.net  or  give us a call at ( 831) 459 8548 or explore our website further  at: http://www.bluewaterventures.org
 
And remember….Adventures are for Life!