MORE GROOVED CLAM SHELLS

An absolutely perfect day for the beach......and some more grooved clam shells to add to the mystery.
The ones below were found at Schmitz Park beach in West Seattle.  One had limpets on the outside of the shell and narrow grooves on the inside.  A few others had worm tubes attached to the shells that left marks where removed but not real grooves.  So we are no nearer to the answer to the mystery except that our octopus expert does not see this as the work of an octopus...so I'm dropping that suspect.  
Just to keep things interesting a jellyfish showed up with what appears to be 10 lobes....red in color and only palm size.  Will need some work on the keys to figure this species out as our common Fried-egg Jellyfish has 16 lobes and the Red Sea Blubber has 8.  

Opalescent Sea Slugs are showing up on Moon Snail sand collars along with their eggs.....as well as the green eggs of the green polychaete worm Phyllodoce williamsi.

Worm tube from inside clam shell with some shell material on tube

Grooves on inside of clam shell #1

Limpets on outside of clam shell #1

Worm tube on outside of clam shell

Same clam shell as above with worm tube removed

Grooved clam shell with perhaps partial Moon Snail drill hole at top

Grooved clam shell with out of place Moon Snail partial drill hole (groove at upper right)

Green worm eggs on sand collar (Phyllodoce williamsi)

Jellyfish species unidentified with what appears to be 10 lobes

Same jellyfish as above swimming

Opalescent Sea Slugs on sand collar

Purple Sea Star with wasting disease...possibly healing?

LUNCH WITH KOZLOFF

Last week I had the great pleasure of having lunch with Dr. Eugene Kozloff one of the world's most respected scientists in the world of marine invertebrates.....he is also an authority on plants of the northwest coast, baroque music and a long list of other areas of study.
Dr. Kozloff was my professor of marine zoology at the University of Washington Friday Harbor Labs in  1975.  He retired from active research last year at age 93.  As always he continues to be the great teacher, and was the inspiration for me to end up teaching marine biology at the Seattle Aquarium.
In the image below you can see that he is still instructing me...This time a lesson on the stupidity of ever getting on that motorcycle...as usual his lesson fell on deaf ears....

JUST WHEN YOU THINK YOU KNOW SOMETHING......

After all these years on the beach I was under the false impression that I actually knew something....I doubt it.  We have come across two mysteries that as yet nobody we've asked has been able to solve.
First are these clam shells with interesting grooves in them......sort of look like ditches made by a run amok "Bertha" but more likely another mollusk using the radula.  So far my best guess is a drunken Moon Snail.  We have top people working on this mystery.
The second mystery is solved.  The mollusk in the bottom image is a Slipper Shell.  Still not certain the species as there are a couple of similar ones around, but Crepipatella dorsata is the call.

Grooved Butter Clam shell (drill hole at top is from Moon Snail

Clam shell with multiple grooves

Slipper Shell (Crepipatella dorsata)

SPRING DEPARTURES AND ENSURING NEW ARRIVALS

California and Steller Sea Lions are all but gone from Puget Sound.  Headed south for the mating season.  The Brant Geese have pushed through on the way north to nesting grounds and large numbers of migrating Surf Scoter ducks are currently resting off Alki for the trip north to Canada and Alaska.
The stay at home River Otters greeted spring with real zesto.....as the mating pair in the images will attest.  In addition a number of species of shorebirds and currently on the migration north.
Finally, May 4th was the one day opening of shrimp season....so lots of fun follies to watch.

Mating River Otters

More River Otter frolics

More

Surf Scoters

Surf Scoters

Dunlin

Brant

Shrimp Opening

Shrimp Opening follies

CALIFORNIA SEA LIONS FEAST BEFORE TRIP SOUTH

California Sea Lions are beginning the trip south from Puget Sound to breeding grounds, as there are no breeding areas in Washington State.  Usually most of the sea lions are gone from Puget Sound sometime in May.  The first ones to return will arrive in August.  Females have only rarely been seen is Washington waters and remain south during the winter months.
While here the sea lions feed on a variety of fish....they are opportunistic hunters.
The images below of several seal lions feeding on a very large school of herring were taken April 23rd in the Duwamish Head area of Alki in West Seattle.  Initially three individuals were feeding for about 2 hours on the same school but the word got out and the number of sea lions increased to at least 7.  Gulls joined the feeding sea lions and also increased in number as time went on....good news travels fast.
Also seen in the area were 2 transient Orcas......looking for harbor seals, porpoises or even sea lions to invite to lunch.  Two were seen again Thursday 4-24.

California Sea Lions (male)

Herring

Gulls on herring

Sea Lion parting herring school

Sea Lion parting herring school

Sea Lions feeding on herring

The Herring for Lunch Bunch

Napping after a big lunch

Stuffed Sea Lions

SEA STAR WASTING DISEASE AT ALKI (CONSTELLATION MARINE RESERVE)

February 27, 2014   Weather:  45 deg no rain or wind.   8:30-9:30 PM
Volunteers completed another survey of Sea Star Wasting Disease at Constellation Marine Reserve during the low tide (minus 1')  Purple and Mottled Sea Stars were examined for various levels of the wasting disease along an exposed section of abandon sewer pipe near the south end of the reserve.
29 Purple Sea Stars were examined and one possible Mottled Star.
Disease rate was approximately 48%  with stages 1 most common and stage 2 less common.
In addition 15 unidentified (Purple or Mottled) sea star juveniles were observed on or near the pipeline 2 of which were showing signs of disease.
March 22 2014.  A count of 104 Purple Stars at the northern 1/3 of Constellation Marine Reserve showed wasting disease in only 1 star (level 1) with two others having possible symptoms.  The remaining Purple Stars all appeared healthy but many were not totally visible.

For more information:  http://www.eeb.ucsc.edu/pacificrockyintertidal/data-products/sea-star-wasting/updates.htmlhttp://data.piscoweb.org/marine1/seastardisease.html

Map of West Coast with areas of wasting disease plotted and species listed.
http://data.piscoweb.org/marine1/seastardisease.html

Purple Sea Stars on old sewer pipe Constellation Marine Reserve Seattle

Purple Sea Stars on old sewer pipe Constellation Marine Reserve Seattle

Sea Star Wasting Disease (white areas)

Survey Team

Checking for wasting disease

What appeared to be a 3 siphon Gaper Clam (but likely only 2 siphon)

DEAD SEA LION TWILIGHT ZONE REVISITED

In previous posts I have presented the story of the dead sea lion that ended up on Alki beach within feet of a large log with a sea lion carving on it......that was strange.  Now we can add another bit of strangeness to the story.  Last night a high tide moved the dead sea lion about 20 yards south of it's original position on the beach.  The sea lion ended up in front of the next condo complex.  On the second floor level condo deck was sitting the perfect Seal Sitter for a dead sea lion......Images tell all.

Original Sea Lion location

New Sea Lion location

Carving of sea lion on log

Seal sitter on 2nd floor deck above sea lion