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Shallow seawater.
Seawater and fresh water contains oxygen that fish absorb using their gill. So the substance is oxygen.
Fishes' gills prevent salt from going into the fishes insides. when a fish opens it's mouth all of the water with the salt is pushed out
101
yes there are different types of gills in different types of fishes.
well... it can harm the habitat of the fishes, the water and even the fishes themselves... this will also lead to the pollution of the specific waterform that had been oil spilled... if this happens then there will be a possibility that the living beings in that place will die...
blow fish
Jelly fishes
Seal
350 500 or 200
small fishes................
sodium is an element and also can be an ingredient of a compound. Sea water contains sodium(salt). They say rainwater is acidic, and if it is then the seawater also contains a form of acid, which is a compound to many types of solutions. Answer to your question: BOTH