Bob McDowell, NIWA expert on fish in NZ does not believe that Crusian carp are in NZ. This said I do having caught them from as far north as Huntley and as far south as Canterbury. DoC have caught what I firmly believe to be Crusians in their "Pest Fish Survey" one about 4 lb from Lake Ellesmere. They sent it to Hamilton Office for an ID with no outcome. They had no DNA sample with which to make a comparison.
RECOGNITION:
Quick n'easy: Look at first two rays of dorsal; soft = crusian hard = gold fish.
Crusians are deep, heavy fish for their size with a hump. Colour is golden with purple th reddy brown fins. Dorsal is convex. Crusians in Eastern Europe reach 6 lb. Hybridises with Commons, Koi and goldfish.
Hybrid Crusian/Comon?Koi called "Super Carp" No barbles, to 9 lb likes dense weeded areas, hard to catch on rod and line. Breeds @ 11 deg C twice as fecund as commons.
sssshhhhh dont tell DOC otherwise they will try and eradicate them!
Any fish with carp in its name is a pest according to DOC basically they would like to see nz reverted back to pre-european times with all introduced fish wiped out! and that includes Trout!作者: songinator 时间: 2014-2-19 11:58:10
Crucian carp inhabit lakes, ponds, and slow-moving rivers throughout Europe and Asia. They rarely exceeds a weight of over 3.3 pounds (1.5 kg). They are often caught as a sport fish: the British rod-caught record for largest crucian is four pounds, nine ounces, caught by Martin Bowler in a lake in southern England in 2003. There have been various bids for a breakage of this record since, but they have been passed off as the specimens have not been said to have been "true" crucians, but hybrids between the carp and one of its relatives, such as the goldfish, which are not native to the British Isles. These hybrids often exhibit hybrid vigour or heterosis, being much more adept at finding food and evading predators than either of their parents, and thus pose somewhat of a threat to the native carp population, and to other native aquatic animals.