I would guess around 5 or 6 per 10 gallons of aquarium space, but a lot depends on whether they are little tetras, medium gouramis, or large Plecostomus catfish. The large fish pollute the water faster, so you must have less of them than you would of, say, the little zebra danios.
You can't put fish in a pond with no water.
it depends how big the fish bowl is
There's no limit. Fish will keep growing until they die.
The general rule for stocking a fish tank is 1 inch of fish per gallon of aquarium water.
Probaly 15-19.
there would be too many fish in the sea way too many so sharks are important to keep the fish population down if they did not exist there would be too many fish
There are many fish in the Pacific Ocean, so there really isn't a constant number (answer). We keep finding new species.
2 or 3
Clown Fish
Tropical and brackish are not mutually exclusive. Tropical means warm, and brackish means somewhat salty. Many brackish fish ARE tropical, and many tropical fish are brackish. You can keep tropical brackish fish with other tropical brackish fish, if they have the same temperment and will not harm or eat eachother. You can keep some brackish fish with some freshwater tropicals, and similarly you can keep some brackish fish with some marine tropicals. There are no wide open set of principles for brackish fish compatability beyond those that I have just illustrated.
A place where fish keep their money.
yes
Dpends on the size of the fish its one inch full grown for every gallon