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anthro aquatic balls biped blue_hair countershade_neck countershade_tail countershade_torso countershading erection fin fish genitals glans grey_body hair hi_res humanoid_genitalia humanoid_penis lddraws male muscular muscular_anthro muscular_male nipple_piercing nipple_ring nipples pecs penis piercing pubes ring_piercing shark shin_(fishyshinobi)simple_background solo striped_body stripes tail tail_fin