Visitors are required to wear a life jacket or wetsuit, you cannot feed the fish or submerge yourself beneath them, only three people (plus a guide) are allowed in the water at one time, and, no, you cannot catch a ride on their fin.
Stephen Hanson, owner of New York's Blue Fin and Ruby Foo's, says that the monthly rent bill for a healthy restaurant is ideally no more than its sales on one busy day.