Do you tip at the San Pedro fish market ?

Only if u want 2

You don't have to. You order and pick up at a counter and seat yourself. They have tip jar when you order and pick up. It's always a good gesture to tip but not necessary.

Yes 15.00 of 85.00 dollars of purchase

I always tip the cleaning person

Yes you should definitely tip.

I was invited there, so no I didn't tip