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abs amur_carp animated animated_comic animated_gif anthro aquatic big_muscles big_pecs big_penis carp comic cyprinid cypriniform duo eel fish genitals growth hi_res huge_muscles huge_pecs huge_penis hyper hyper_genitalia hyper_muscles hyper_penis koi male male/male muscle_growth muscular muscular_anthro muscular_male pecs penis penis_size_difference proxol_(artist)short_playtime text typical_carp