Help, I am not a fisherman.

Their are different species of carp, common, mirror, etc. Yoir probaly talking about common carp. You dont have to use worms, just use whole kernel corn or even a piece of white bread . Carp are very easily recognize from their mouth that is a sucker mouth they vaccum the bottoms of lakes ponds etc. Their scales can be a decent size in diameter from other freshwater species, average size carp i would say 7-20 lbs is pretty common here.  and also well my opinion is they almost like prehistoric. Check out google and type in common carp. By the way My profile picture is a carp. hope that helps.

Thank you Jessica and Angelo, I really appreciate your response.  I just started reading up on carp, and I am surprised that the guy who sold me the 29 cents goldfsh, which are as small as minnos suggested I fish for carp.  I think Carp might be too big for my pond, perhaps I should stick with algea eating plants. 

Tadpoles eat algae.  Rescue them from puddle that are goin to dry out.  They'll grow into frogs, who'll produce more tadpoles for you.

Goldfish are carp.

Goldfish are not carp they are goldfish.

There are many species of carp and yes they get large. Goldfish may work fine for you. In many states you would be breaking the law transporting fish caught out of a body of water to stock in a pond.