It was one of the earliest fish to be domesticated, and is one of the most commonly kept aquarium fish. A relatively small member of the carp family (which also includes the koi carp and the crucian carp), the goldfish is a domesticated version of a less-colourful carp (Carassius auratus) native to east Asia.
Causes Causes of warts and verrucas. Warts and verrucas are caused by the human papilloma virus (HPV), of which there are over 100 different types. The virus infects cells in the outer layer of your skin. Warts and verrucas can spread from person to person by direct skin contact.They can also spread by contact with floors or surfaces contaminated with the virus. Although warts are contagious, itâs thought that the risk of catching them is fairly low.arts and verrucas are usually caused by direct skin contact or contact with surfaces contaminated with the human papilloma virus (HPV). Itâs hard to completely avoid coming into contact with HPV but taking the following precautions can help prevent warts and verrucas. 1  Try not to touch other peopleâs warts or verrucas.
Other types of HPV can cause warts and verrucas. These types of HPV are sometimes called the wart virus or genital wart virus and they include types 6 and 11. Warts and verrucas are most common on the hands and feet, in the genital area and around the anus.But they can be on any part of the body.ypes of HPV that affect the skin can be passed on by skin contact with an affected person. The types of HPV that affect the mouth and throat can be passed on through certain sexual behaviours such as open mouth kissing and oral sex. Genital HPV is usually spread through intimate, skin to skin, contact during sex.