Sorry about the capital letters just in a hurry and caps lock on.
Look around for different species of silver dollars, there is about a dozen, all will schoal toghether. Gives some variation, some are round and keep the silver dollar shape others grow ablong. Some dollars have spots, some have just one spot. One species has an orange coloration under the belly and a goldish tint. Another species is a little darker and stays smaller. The redhooks get about 8-10 inches. These species all have big scientific names, do some research.
These fish are one of my favorites. Great fish! One pair I have is 10 years old, one of these guys just died two days ago, I think old age?