One or more males attach themselves permanently to a female, eventually merging circulatory systems. As this genetic chimera matures, the male grows large testicles, while the rest of its body atrophies. Ceratiidae are the only creatures known to become chimeras as a normal part of their lifecycle.
One or more males attach themselves permanently to a female, eventually merging circulatory systems. As this genetic chimera develops, the male grows large testicles while the rest of its body shrinks. Ceratiidae are the only creatures known to become chimeras as a normal part of their life cycle.