For hardware description language file, see VHDL. VHD (Virtual Hard Disk) is a file format which represents a virtual hard disk drive (HDD). It may contain what is found on a physical HDD, such as disk partitions and a file system, which in turn can contain files and folders. It is typically used as the hard disk of a virtual machine.
Typically, koi eggs will hatch in less than a week. Koi eggs are very small, bead-like specks that can vary from milky white to yellow or green. Upon closer inspection, you can see two black dots through the transparent membrane of the egg. These are the developing eyes of the koi.
Male Koi will be ready to breed when they are 2 years old, but females should be 3 years old. It is possible though that younger Koi will breed but their offspring will be of poor quality. Eggs are spawn and sperm is milt. The female is capable of carrying around 100,000 eggs for every 1kg of body weight.