Give examples of organisms living in the surface layer of water

a) in the surface layer of water – water lilies, frogs, small fish;
b) in the water column – whales, sharks, dolphins;
c) at the bottom of the ocean – stingrays, crayfish, mollusks

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.