Yellow Tangs are schooling fish which I heard that they need to be in odd numbers & that the tank should be at least 150g, no shorter than 6 feet in length. As a side note, I stopped by my LFS
on Sunday & this was a site to see, estimated 250 yellow tangs in a 240g tank @ $14.99 a piece. It was mesmerizing, wall to wall YTs and not one casualty at the bottom of the tank.
As I poked around for an hour, store manager tells one of the employees to write up & pack 100 YTs for a customer. Can you imagine someone buying 100 YTs! I hope the guy does not think he can keep 100 YTs because he saw double that amount in the store tank.