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2016 abs anthro aquatic balls biceps biped blue_eyes blush butt circumcised colored digital_media_(artwork)erection fin fish genitals hair hand_on_butt humanoid_genitalia humanoid_penis joji looking_at_viewer male markings non-mammal_balls nude penis shaded shark side_view signature simple_background smile solo tail tail_fin teeth tiberius_creations vein veiny_penis