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Shellfish Research and Information
Services for the U.S. West Coast

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Ecosystem Services

On the Farm

Improve Water Quality

Ecosystem Services Photo

Learn more about how shellfish can improve water quality and provide important habitat for other marine organisms.

On the Farm Photo

What does it take to be a shellfish farmer? Watch this video on the ins and outs of growing and harvesting shellfish in Puget Sound. Watch Video.

Improve Water Quality Photo

Learn 5 simple steps you can take to improve water quality in your area. Learn more...

Project Highlights


Regional Eelgrass/Shellfish Consortia

In collaboration with shellfish farms along the west coast, we will assess the interaction of eelgrass with various oyster culture systems, and the ecological functions of these habitats for managed fish and invertebrate species.

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Pacific Oyster Mortality

Pacific Oyster Mortality

Significant summer mortality events have occurred with increasing frequency and severity over the past sixty years. These events affect both triploid and dipoloid oysters often during the second year of growout when they near market size.

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Rock Scallop Biotoxin Monitoring

Our team assessed rock scallop uptake, tissue concentration and depuration trends of naturally occuring toxins that can cause Paralytic Shellfish Poisoning (PSP) and Diarrhetic Shellfish Poisoning (DSP) in humans.

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Sea Cucumber

Growing Native Sea Cucumbers

PSI and partners are developing polyculture methods for the native, giant red sea cucumber, Parastichopus californicus as a nutrient recycler and promising species for U.S. export.

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Tracking Shellfish Production

Tracking Shellfish Production

U.S. west coast shellfish production accounts for two-thirds of all bivalve aquaculture sales and exceeds $128 million a year, with Washington accounting for 85% of the commercial product..

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Contact Us

Visit our contact page for general inquiries, location information, and for individual staff email.


FREE Services for Shellfish Farmers

PSI has developed a simple Shellfish Mortality Reporting Form. Voluntary reporting of shellfish mortalities is an important source of information for tracking direct impacts of mortality events. A pdf copy of the form is also available.

Funding is available to cover the cost of diagnostic screening for shellfish farms in WA, OR, CA, and AK. Click here to learn more.


What's Blooming in Budd? Click on the Protoperidinium to find out:


2024 Summer Schedule & Updates! Join PSI Thursdays, 10-12pm at the Port Plaza dock to sample plankton and learn more about water quality in Budd Inlet!


Where are the Dungeness Crab in South Puget Sound?

Light Trap Monitoring

Follow our team of biologists April - September as we monitor for larval crab at the Zittel's marina light trap! Learn more here...


Now available to check out from the Olympia, Lacey and Tumwater Timberland Libraries!

Click here to learn more about these lendable kits.


Click here to review available documents, organzied by topic.

Recently added:

J. L. Ruesink, K. Houle, E. Beck, F. C. Boardman, A. Suhrbier, B. Hudson. 2023. Intertidal Grow-Out Technique, Not Eelgrass (Zostera marina), Influences Performance of Pacific Oysters (Magallana gigas). Aquaculture Research, vol. 2023, Article ID 6621043, 13 pages.