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2017 abs anthro aquatic balls biceps big_penis biped blue_sky castbound cloud countershading day detailed_background digital_media_(artwork)elbow_fin erection fin fish front_view genitals gills glans grey_body grey_skin grey_tail head_fin hi_res holding_object humanoid_genitalia humanoid_penis legs_in_water looking_at_viewer male multicolored_body multicolored_skin multicolored_tail muscular muscular_anthro muscular_male nude outside partially_submerged pecs penis portrait red_eyes shark sharp_teeth signature sky solo standing standing_in_water straight_legs submerged_legs tail tail_fin teeth thick_tail three-quarter_portrait two_tone_body two_tone_skin two_tone_tail vein veiny_penis water white_balls white_body white_penis white_skin white_tail