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 eggs take roughly a week to hatch, give or take a day or two accounting for temperature of the water. You do want to make sure that you remove the parents or eggs to a q â¦ uiet tank or pool, the parents will eat the eggs and young fry. Angelfish eggs will hatch in about 60 hours at 80Â° F-according to http://www.angelsplus.com/Breeding2.htm    3-4 days.