The monitoring of mercury levels is required for a wide range of industries: 1  Foodâmercury levels in fish, vegetables, and drinking water. 2  Mining and oilâmercury is used in the extraction of gold; mercury traces are found in natural gas and oil.
The blobfish (Psychrolutes marcidus) is a deep sea fish of the family Psychrolutidae. It inhabits the deep waters off the coasts of mainland Australia and Tasmania, as well as the waters of New Zealand.Blobfish are typically shorter than 30 cm.They live at depths between 600 and 1,200 m (2,000 and 3,900 ft) where the pressure is 60 to 120 times as great as at sea level, which would likely make gas bladders inefficient for maintaining buoyancy.lobfish are often caught as bycatch in bottom trawling nets. Scientists now fear the blobfish could become an endangered species because of deep-ocean trawling.
Saltwater fishcannot live in fresh water. Fish that live in the salty water of the oceans include bluefish, cod, flounder, sea trout, tarpon, tuna, halibut, rockfish, sea perch, lingcod and yellowtail. Freshwater fish cannot live in salt water. Fresh water contains much less salt than the ocean.