The horn shark has a short, wide head with a blunt snout and prominent supraorbital ridges over the eyes. Reproduction is oviparous, with females laying up to 24 eggs from February to April. After laying, the female picks up the auger-shaped egg cases and wedges them into crevices to protect them from predators.With around 1 billion individuals alive at any time, the domesticated pig is one of the most numerous large mammals on the planet. Researchers at Penn States University have found that pigs can play video games using joystick and excel at it.Lobsters have long bodies with muscular tails, and live in crevices or burrows on the sea floor. Highly prized as seafood, lobsters are economically important, and are often one of the most profitable commodities in coastal areas they populate.Although members of most wallaby species are small, some can grow up to approximately two metres in length (from head to end of tail). After ingesting opium poppies, Australian wallabies have made crop circles in the field grown for medicine.Homosexual behavior in animals is sexual behavior among non-human species that is interpreted as homosexual or bisexual. Elephants are often bisexual creatures. Almost 45% of their sexual activity happens between the same sex.Black Panthers, jaguars, leopards and cougars are actually the same species of animals. The Panther tends to be dark brown to black in colour and is otherwise identical to the feline species to which it belongs. Black Panthers are black due to Melanism, the development of dark pigmentation.A chunk six pound whale vomit has sold for more than $150,000. It has huge demand and is used in the manufacturing of high-end perfumes.Many animals, both domestic and otherwise, have been known to commit suicide. Animal suicide refers to any kind of self-destructive behavior displayed by various species of non-human animals that has been likened to suicide.Octopuses are among the most intelligent and behaviorally diverse of all invertebrates. When octopuses reproduce, the male uses a specialized arm called a hectocotylus to transfer spermatophores (packets of sperm) from the terminal organ of the reproductive tract (the cephalopod “penis”) into the female’s mantle cavity.Dead whales that wash up to the beach can bloat so large that the pressure can cause it to explode splattering all its innards out.Due to its low-density flesh, the blobfish’s shape is very different when it is out of water. Its anthropomorphic and unappealing looks have created much discussion in media outlets. The blobfish was voted the “World’s Ugliest Animal”.When hippos are upset, their sweat turns red. Hippopotamuses secrete an oily red liquid that acts as sunblock and moisturizer.An elephant in Corbett National Park, India, was so smitten by a lizard that she played with it and took it along with her for a few days.Male giraffes often drink the urine of a female to determine if she is fertile in a process known as flehmen response.A male porcupine douses the female with his urine to provoke her into having sex.The penises of male alligators are always erect. They stay inside their body until they are needed.An estimated one third of all sex among ducks is forced sex. It is so prevalent that the females’ genitals are evolving to counter it.Pigs can ejaculate for up to a surprising 6 to 30 minutes continuously.Female spotted hyenas have penises that serve as an anti-rape mechanism. The male has to enter through it during copulation rather than the vagina.