If you have seen a miniature freshwater dolphin fish, you likely saw an elephant nose fish. This is an African freshwater elephant fish that is popular in many aquariums.
A fish tank would be considered an ecosyestem because there is a living thing in it. (the fish)
a net
Likely either snails or flatworms.
the tank will cost with every thing it is about $250
No. It would need a huge tank, not to mention all the fish you would have to buy it.
My Friend "Annie Dolphin" Live in a house 25,000 sq ft. So if she and her 4 family members live in there OBVIOSLY that means that a average one Dolphin tank would be 5,000-7,000 sq ft.
if it is just in a fish bowland its the only thing in their i wouldn't waist my money but if it is in an actual tank and you have any other fish in their than yes
Probably the same thing you're feeding it in when it's in the pond.
one thing that fish don't share is behavior. every fishes behavior is different from other. i have a fish tank full of fish they all act different to me.
The only thing that you can put in a tank that small is a betta fish or african dwarf frog. Tropical fish do better in a tank that is ten gallons or more. If the tank has a filter and heater you could put one guppy into it but that would be all and I doubt it has a filter and a heater.
That all depends on how big the fish are. The rule is "1 inch of fish needs a minimum of 1 gallon of water". The tank could easilly be overcrowded if it is stocked with large cichlids and understocked (if there is such a thing) if the fish are Neon Tetras.
No catfish is an aquarium cleaner. There is no such thing as a fish that will clean a tank.