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2015 animal_genitalia anthro aquatic archaeocete athletic balls basilosaurid basilosaurus big_tail black_body black_scales blue_eyes cetacean cool_colors genital_slit genitals hi_res hybrid male mammal mosasaur mosasaurus multicolored_body multicolored_scales muscular muscular_anthro navel nipples nude prehistoric_species reptile scales scalie sheath smooshkin solo swimming tail teal_theme two_tone_body two_tone_scales underwater water watermark whale white_body white_scales withdrawn_penis