@whitequark very nearly none at all (unless you count all the times that i had line of sight to a poster for the 1975 Spielberg film _Jaws_, but then i wasn't really thinking about it volitionally so much as the concept was being advertised at me)
@whitequark i have a marine biology degree and am frequently miffed at things that have "fish" in the name that are not strictly (teleost) fish. teleost fish are in part defined by having a jaw structure.