Replace bad ones with USCG Type A alcohol-resistant, fuel line hose. Dispose of old antifreeze and oil on shore in a waste oil recycling container. Use a large drop cloth to catch paint scrapings, or sweep them up and put them in the trash. Use nonphosphate detergents and a little elbow grease instead of harsh, toxic teak and hull cleaners. But there are a few things you might want to know about shellfish.
Shellfish are filter feeders.
This means that they take in large volumes of water during feeding, contaminates and all. When boats anchor near shellfish beds and discharge sewage, the shellfish may take up some of the disease-causing bacteria present in the sewage. Eating contaminated shellfish could cause gastrointestinal disorders, nausea, diarrhea, infectious hepatitis or other diseases. Be sure not to discharge any sewage in shellfish areas. Pay attention to the posted signs warning of possible shellfish contamination.