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Barnacle

Barnacle, Balanus improvisus [0:22]
Video by Adam Frederick, Maryland Sea Grant
video | comments

Hooked Mussel

Hooked Mussel, Ischadium recurvum [1:47]
Video by Adam Frederick, Maryland Sea Grant
video | comments

Hooked Mussel

Dark False Mussel, Mytilopsis leucophaeata [8:01]
Video by the Magothy River Association (used with permission)
video | comments

Parchment Worm

Parchment Worm, Chaetopterus variopedatus [1:10]
Video by Adam Frederick, Maryland Sea Grant
video | comments One of only a few true filter-feeding worms in the Bay, the parchment worm feeds on suspended organic material. The video shows the parchment worm in the laboratory, outside the tube that it creates to live in, so we can see its anatomy and feeding structures. Winglike notopodia pump sea water through its tube and the notopodia secrete mucus that is drawn back, forming a bag. The mucus bag filters the water to retain finer particles. Periodically, the particles are transported back to the mouth by the dorsal ciliated groove and ingested.

oysters

Oyster, Crassostrea virginica [0:43]
Video by the Chesapeake Bay Foundation (on YouTube)
video | comments Still the go-to filter feeder in the Bay, this native oyster can process water at rates 2-3 times that of other bivalves. Beating cilia draw water over the gills where plankton and other particles are trapped in mucus and sent to the mouth. Follow the link to see this video on YouTube, from the Chesapeake Bay Foundation, which shows time-lapse photography of the capacity of oysters to clear the water.