rule 34 abs ai generated ambient fish ambient sealife anal gape anthro anus armpits ass bara barazoku black body claws coral coral reef dorsal fin fat mons feet fin fish gape gaping gaping anus gay genital slit grin hands behind head male male only marine muscle muscular muscular anthro muscular male navel nipples ocean ocean background ocean floor penis plump slit presenting presenting anus presenting ass presenting butt presenting gape presenting hindquarters presenting penis relaxing shark shark tail sharp teeth solo solo male spread legs spreading stable diffusion tail teeth thick thighs underwater white belly yaoi yellow eyes 8927642