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aquariums
Well, I caught an adult gambusia fish at my baby cousin's third birthday party, in a lake. My cousin is now five years old. I have had it for three years and it was an adult when I caught it. (I know because after I caught it, it had a baby!)
No, Bettas are strictly freshwater fish.
Paramecium live in freshwater and are also found in aquariums.
The oldest human beings have lived to be 120 years old. There is no fish that lives as long as that. Fish have been kept in aquariums for years. There is no known fish that can live as long as human can.
No, there are special live plants grown just for fresh water or salt water fish aquariums. There are also plastic fake plants that are made for all aquariums.
A dolphin eats fish, so it hunts in water. Dolphins that live in Aquariums or zoo's are fed by workers, though.
fish and little bugs
There are fish from several genera called Frog fish (Angler fish). They require specific marine living conditions in order to survive. In a fresh water aquarium they would be dead almost immediately.
the smallest fish that live in ocean is tiny goby
No. Male bettas can be kept in community aquariums, but should not be kept with fish that look anything like they do, or are small enough to eat. A male betta will mistake a guppy for another betta and kill it. Female bettas, however, can be kept with other "betta-like" fish without a problem.
Smaller fish.