? Crucian Carp Conservation status: Least concern (LR/lc)
Scientific classification
Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Cypriniformes Family: Cyprinidae Genus: Carassius Species: C. carassius
Binomial name
Carassius carassius (Linnaeus, 1758)

The Crucian Carp (Carassius carassius) is a member of the family Cyprinidae, which includes many other fish such as the common carp, or the smaller minnows. They inhabit lakes, ponds, and slow-moving rivers throughout Europe and Asia. The crucian is a medium-sized cyprinid, which rarely exceeds a weight of over 3.3 pounds (1.5 kg). They usually have a dark green back, golden sides, and reddish fins, although other colour variations exist. The conservation status of a species is an indicator of the likelihood of that species continuing to survive. ... Image File history File links Crucian_carp. ... Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms (as opposed to folk taxonomy). ... Phyla Animals are a major group of organisms, classified as the kingdom Animalia or Meta­zoa. ... Typical Classes Subphylum Urochordata - Tunicatas Ascidiacea Thaliacea Larvacea Subphylum Cephalochordata - Lancelets Subphylum Myxini - Hagfishes Subphylum Vertebrata - Vertebrates Petromyzontida - Lampreys Placodermi (extinct) Chondrichthyes - Cartilaginous fishes Acanthodii (extinct) Actinopterygii - Ray-finned fishes Actinistia - Coelacanths Dipnoi - Lungfishes Amphibia - Amphibians Reptilia - Reptiles Aves - Birds Mammalia - Mammals Chordates (phylum Chordata) include the vertebrates, together with... Orders See text The Actinopterygii are the ray-finned fish. ... Families Suborder Cobitoidea     Balitoridae (hillstream loaches)     Catostomidae (suckers)     Cobitidae (loaches)     Gyrinocheilidae (algae eaters) Suborder Cyprinoidea     Cyprinidae (carps and minnows) The Cypriniformes are an order of ray-finned fish, including the minnows and some related families. ... Genera (many, see text) The family Cyprinidae, named after the Greek word for goldfish, consists of the carps and minnows. ... In biology, binomial nomenclature is the formal method of naming species. ... Carolus Linnaeus Carl Linnaeus, also known after his ennoblement as , (May 23, 1707 – January 10, 1778), was a Swedish botanist, physician and zoologist[1] who laid the foundations for the modern scheme of nomenclature. ... 1758 was a common year starting on Sunday (see link for calendar). ... Genera (many, see text) The family Cyprinidae, named after the Greek word for goldfish, consists of the carps and minnows. ... Binomial name Cyprinus carpio (Linnaeus, 1758) The Common Carp or European Carp (Cyprinus carpio) is a widespread freshwater fish distantly related to the common goldfish, which it is capable of interbreeding with. ... The word minnow can mean, in decreasing order of specificity: The Eurasian minnow, Phoxinus phoxinus (Linnaeus, 1758) Any, particularly small, fish of the family Cyprinidae Fish of the family Galaxiidae, in particular those of genus galaxiid occurring in the Southern Hemisphere. ...

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. 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... Trinomial name Carassius auratus auratus (Linnaeus, 1758) The goldfish (Carassius auratus auratus) was one of the earliest fish to be domesticated, and is still one of the most commonly kept aquarium fish. ... Heterosis is increased strength of different characteristics in hybrids; the possibility to obtain a better individual by combining the virtues of its parents. ... Heterosis is increased strength of different characteristics in hybrids; the possibility to obtain a better individual by combining the virtues of its parents. ...

These carp are also occasionally kept as freshwater aquarium fish, as well as in water gardens, although they are not commonly available commercially, mainly because they are not in particularly high demand due to the presence of more colourful fish such as the koi or orfe. A garden pond. ... Binomial name Cyprinus carpio (Linnaeus, 1758) Koi (Chinese and Japanese: 鯉, Romaji: koi) are ornamental domesticated varieties of the common carp Cyprinus carpio, originated from China and widely spread in Japan. ... See Integrated Development Environment (IDE) Integrated_development_environment Binomial name Leuciscus idus Linnaeus, 1758 The ide or orfe, Leuciscus idus, is a freshwater fish of the family Cyprinidae found across northern Europe and Asia. ...

Many sources will claim that crucian carp are the wild version of the goldfish. While they are certainly very closely related and can be regarded as the ancestors of goldfish they are not the same subspecies. Analysis has revealed key anatomical differences between them; further details are on the goldfish page. Trinomial name Carassius auratus auratus (Linnaeus, 1758) The goldfish (Carassius auratus auratus) was one of the earliest fish to be domesticated, and is still one of the most commonly kept aquarium fish. ... Trinomial name Carassius auratus auratus (Linnaeus, 1758) The goldfish (Carassius auratus auratus) was one of the earliest fish to be domesticated, and is still one of the most commonly kept aquarium fish. ...

References

• World Conservation Monitoring Centre (1996). Carassius carassius. 2006 IUCN Red List of Threatened Species. IUCN 2006. Downloaded on 12 May 2006.

• Carassius carassius (TSN 163352). Integrated Taxonomic Information System. Accessed on 6 February 2006.
• Fish Holds Breath for Months