What does a goldfish tattoo symbolise?

the common goldfish changes size depending on its home. if a small goldfish is kept in a little bowl it will not grow, however if it is kept in a large aquarium or pond it will grow much larger than its orginial size. therefore a gold fish can represent growth or the saying "a big fish in a little pond". but a koi fish which can be easily confused with a goldfish is completely different. the koi fish represents courage so look into that further if you're interested.