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.
  Koi breed once a year around spring time when the temperature changes. There are many factors that determines the amount of eggs a koi will produce. Diet or the fish's â¦ state of health can affect it.For a koi fish in good health and approximate figure is about 45,000 per pound of fish. Koi breed once a year around spring time when the temperature changes. There are many factors that determines the amount of eggs a koi will produce. Diet or the fish's â¦ state of health can affect it.