The male deep-sea squid O. deletron seems as likely to mate with another male as a female.
From an evolutionary and biological perspective, animals are driven to have sex in order to procreate. But there is a lot more to sexual relations between animals. Animal sex is at least as strange and varied as human sex. A male might copulate with many females. And female animals of many species can be choosy, too. Homosexuality is common. Monogamy is rare. And the animal kingdom is full of swingers. In short, with animals, sex can be wild.
Just a touch of the chemical and squid went from swimming calmly to fin beating and forward lunging.
Female cane toads inflate their bodies to thwart sex. These inflatable toads can decide the father in this strange animal sex act.
Male topi antelopes keep a mate around by snorting deceptively, a pretense that makes her think leaving him will bring her face-to-face with danger.
Buffalos in South Africa appear to give birth to more males during the rainy season, and scientists think certain genes are responsible
Female crayfish release urine to attract mates. But the aphrodisiac confuses males, that use it as a sign of violence.
The role pheromones play in the mating game may have more to do with repelling than attracting, a new study suggests.
The sperm of one male may have to compete with those from another. How and why they do it is surprising.
Animals obviously hook up, at least during mating season. But do they like it? According to experts, there are two answers: yes, and it is impossible to know.