Melibe leonina swimming nudibranchs

There have been lots of Melibe swimming in the nearshore surface waters throughout north "Puget Sound" from late August to December: at least from Port Townsend to Friday Harbor to Bellingham and north into the Strait of Georgia. Today in 30 minutes I saw 53 Melibe leonina in the upper meter or so in Friday Harbor. This nudibranch is usually found on eelgrass around here.