Marine Osteichthyes (Bony fish) not because I don't think other things like Sharks, Rays (Cartilaginous fish) and Agnathans "don't count as fish", but because I'm too lazy. Maybe I'll include them some day. If a groups includes both fresh- and marine- water members, I'll still include it, that explains why "River garfish" (that name sucks) are still included.