TV / Movies: Born Aug 10, 1960, He Starred In This Movie: Los Zancos ?

Questions

in folklore, supernatural, sea-dwelling creature with the head and upper body of a beautiful woman and the lower body of a fish?

in football, what are the white marks intersecting each five-yard line?

in football, where are the hashmarks?

in greek mythology who did athena turn into a spider?

in greek mythology who ferries the dead across the river styx?