What species of fish is white with a brown tail?

I saw a fish in one of the aquariums at the San Francisco airport and there was no sign that said what it was called. The fish's body and fins are white, and the tail is a dark brown color. I've taken to calling it a root beer float fish. Anyway, any fish experts out there who know what this variety is called? It wasn't very big. If I remember correctly, about six inches in length give or take an inch.

Public Comments

1. definintly has to be either brown tailed trout or osmetihng else