Ehh this is a hit or miss thing. But its not just with fish stuff. I mean sometimes I go to one of my favorite fish stores and you can just tell the guy doesnt know a thing about fish. Then sometimes you can go to petsmart and find someone who does know things. It depends on where you go, and who you get to help you. Hit and miss. But same thing goes for buying a car. I went to dodge few years back was lookin at an srt4 (turbo front wheel drive car) When he popped the hood I said yea I love turbos. He didnt have a clue where I was looking in the car, didnt even seem like he knew it was a turbo. I say hit or miss.
If it were me getting a cheaper fish, knowing myself, Id probably say something just because I totally believe in karma. I wouldnt give him the whole shake down on fish, but maybe throw out some basics "hey you know this is a blah blah blah..... the one I want has a blah blah blahh..." I used to work at petco a long time ago, worked in fish sometimes. I knew a bit about fish but didnt know much at the time. I hated when people would come in shouting out how much they knew at me and how I was making a mistake if I did.
Id just kinda mess with him a little in a funny way. Oh yea ill take the GREEN one.. hehe.. I probably would have corrected the fish though. But Id do it just not in a jackass way makin me seem like I knew everything. Dunoo!! its a interesting situation. Im not tryin to start fights or take sides, Im just sayin what I would probably do.