Seafood, like produce, has seasons - see what they are on the West Coast of the U.S. with this Guide to West Coast Seafood Seasons. Peak seasons are noted for the entire West Coast, regions may have shorter seasons.
Note: Modern flash-freeze methods make most of these fish available at high quality year-round.
Abalone, only farmed abalone is available commercially and that is available year-round. The season for diving for you own wild abalone is tightly regulated - see your state's department of fish and game for specifics.
Albacore tuna, June through August
Anchovies, May though October
Clams, October through June
Dungeness Crab, November through February southern area and June through August north
Halibut, March through November
Mussels (farmed), year-round
Oregon Pink Shrimp, May though September
Oysters (farmed), year-round
Rainbow Trout (farmed), year-round
Sablefish (a.k.a. black cod or butterfish), March through November
Salmon, May through September
Sardines, availability varies but they are in season all year
Spiny Lobster, October through December
Spot Prawns, February through December
Squid, April through February
Tuna (Pacific Albacore), June and July