no! don't call someone to remove it. they will more than likely kill
it. if by some chance it's a decent pound, they may just nuter and give
it it's shots and release it somewhere.

i have 4 cats. i have several aquariums inside and they are allowed to
see the pond outside. they all like to drink aquarium/pond water but
they don't hurt the fish. the only fish they can catch are the dead
ones or ones that have jumped out of the aquarium. cats are not good
hunters when it comes to water. fish are simply too quick and the cats
don't want to get wet.

maybe with the weather warming up your goldfish want to stay at the
bottom where it's cooler? just a thought.