Plastic on the Beach

How much plastic does modern industrial aquaculture introduce into the shoreline ecosystem?

Geoduck farms, as an example, generally embed over 40,000 PVC tubes per acre into the shallow waters and tidelands of Puget Sound. Tubes are often covered with nets, which are held in place with rubber bands. All of these materials pose toxicity and habitat hazards, not to mention the loss in aesthetic value to the shoreline.