DSC_1795 Koi carp (Cyprinus carpio) a decorative form of the common carp, selectively bred for colour, and first developed In the Niigata region of Japan in the 1820s. Although popular as pond fish, they have become one of the most invasive fish species worldwide. In NZ Koi have been spread through illegal stocking into various lakes and ponds in the North Island from the 1980s onwards. They feed by vacuuming up lakebed detritus and blowing unwanted sediments back out, making water turbid which reduces macrophytes, and degrades lake habitats. Lake Waikare *
DSC_1467 Koi carp (Cyprinus carpio) habitat. Koi are native to Asia and Europe, they feed by vacuuming up detritus and blowing unwanted sediments back into the water column, making the water turbid and changing the habitat as can be seen here. Koi are considered one of the most invasive fish species worldwide. Whangamarino River *
DSC_1466 Koi carp (Cyprinus carpio) are an ornamental strain of the common carp native to Asia and Europe. One of the most invasive fish species worldwide, koi feed by vacuuming up detritus and blowing unwanted sediments back out, making the water turbid and changing the habitat. This sign asks Asian fishermen to kill any koi they catch *
