fish!

if you are interested in keeping such large fish the only way to do so is to buy a larger aquarium of at least 150 gallons for all those fish, even then it will be cramped

 

Yellow tang in a 55 is per min if the tank is 4ft long if you do your rockwork right. I would do 1 yellow tang, 2 clowns and goby.

 

+1 to this. If you get a tang, it would have to be a bristletooth, tomini or kole tang. Anything else would likely be too big once fully grown.

 

i recently went to my local saltwater store and they had a trigger fish in a 20 gallon tank. it was small but i could always bring it back if i gets to big for my 55.

 

At your lfs that trigger won't be in the 20g tank for its entire life. At 20g, it was probably a very small trigger, and it will be sold before becoming too large for the tank, or it will be moved into a larger tank there.

Yes, you can always take the fish back for a credit when it becomes to large for your tank.

Or upgrade to a larger tank

 

A Picasso Trigger would be good alone in a 55g.

Peaceful Tank:
2 Yellow Assessor
2 Pajama Cardinal Fish
1 Golden Wrasse
1 Falco's Hawkfish

 

A foxface. Wonderful wonderful fish. Very personable, big, bright yellow and very hardy.

 

Here's the solution a bigger tank or go with the ideas of the knowledgeable people on the site who are trying to help you. Just because you see something does not mean it is a good idea.