The inability to sleep is often caused by the lack of the pineal gland to secrete:

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

yes it is   dangerous

explanation:

because that foot is discusting and could get you sick