changing the ph of water can cause animals live in the water not be able to survive
water_in_oceans has salt humans_must has water_to_survive oceans has salt_water_in freshwater has less_salt_than_seawater fish has gills_which_allow_breathing_water swimming_in_ocean has effect_of_tasting_salt water_in_ocean has salt oceans has salt_water red_water is animal_disease. aquarium has water