Rule 34 Dev - 3_toes 4_fingers anthro arm_support athletic athletic_anthro athletic_female back_spine bent_leg big_breasts breasts butt erect_nipples extended_arms extended_leg feet female fin fingers fish_tail forward_arm_support front_view gaping_mouth humanoid_feet humanoid_hands looking_up lying nipples non-mammal_breasts nude on_front one_calf_up open_mouth plantigrade pose raised_calf simple_background solo spines toes white_background kostos_art fish gobiiform marine mudskipper 2017 black_and_white digital_drawing_(artwork) digital_media_(artwork) full-length_portrait guide_lines line_art monochrome pinup portrait sketch|5600753340