The Big ImageBoard (TBIB) - animal genitalia archaeoceti barely visible eyes basilosaurid basilosaurus big dom small sub black background cetacean cloaca cloacal cloacal penetration digital media (artwork) dodgernova dominant duo elasmosaurid elasmosaurus erection extinct female female penetrated feral feral on feral feral penetrated feral penetrating feral penetrating feral flippers genitals hi res interspecies larger male long neck male male/female male penetrating male penetrating female mammal marine monochrome open mouth penetration penile penile penetration penile spines penis penis in cloaca plesiosaur prehistoric species reptile scalie sex sharp teeth signature simple background size difference smaller female striped neck tail teeth underwater underwater sex water whale