Narrownose chimaera | |
---|---|
| |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Chondrichthyes |
Subclass: | Holocephali |
Order: | Chimaeriformes |
Family: | Rhinochimaeridae |
Genus: | Harriotta |
Species: | H. raleighana |
Binomial name | |
Harriotta raleighana Goode & T. H. Bean, 1895 | |
The narrownose chimaera (Harriotta raleighana) is a longnose chimaera of the family Rhinochimaeridae, [2] the longnose chimaeras, consisting of eight species belonging three genera. [3] This species is found in temperate seas worldwide, at depths between 200 and 3,100 m. [2] Its length is between 1.0 and 1.5 m, including a long, tapering snout and a long, filamentous tail. [4]
This species was first described by George Brown Goode and Tarleton Hoffman Bean in 1895. [5] The genus Harriotta refers to Thomas Harriot and the species name references Sir Walter Raleigh. [2] [6]
Narrownose chimaeras have elongate rostra, slender tails, large pectoral and pelvic fins, large eyes, and two dorsal fins, the first being preceded by a mildly toxic spine. [3] [6] They possess two pairs of non-replaceable tooth plates in the upper jaw and a one pair in the lower jaw. [7] Male H. raleighana are estimated to reach 62.8 cm (24.7 in) and female 75.8 cm (29.8 in) at maturity, respectively. [8]
The narrownose chimaera is found off Nova Scotia and in much of the rest of the Atlantic Ocean, [9] and in parts of the Pacific Ocean to depths of 3100 metres. [3] Very little is known of their biology due to their deep water habitats. [7]
Longnose chimaeras are members of the class Chondrichthyes, diverging from their closest relatives (sharks, rays, and skates) approximately 400 million years ago. [10] Like many other Chondrichthyes, longnose chimaeras reproduce by laying eggs. [8] Egg cases consist of a central chamber surrounded by a web-like structure. [7] Female longnose chimaeras lay a pair of eggs several times per season. [10]
The IUCN has classified this species as being of least concern. [1] In June 2018 the New Zealand Department of Conservation classified the narrownose chimaera as "Not Threatened" under the New Zealand Threat Classification System. [11]
Media related to Harriotta raleighana at Wikimedia Commons
The goblin shark is a rare species of deep-sea shark. Sometimes called a "living fossil", it is the only extant representative of the family Mitsukurinidae, a lineage some 125 million years old. This pink-skinned animal has a distinctive profile with an elongated, flat snout, and highly protrusible jaws containing prominent nail-like teeth. It is usually between 3 and 4 m long when mature, though it can grow considerably larger such as one captured in 2000 that is thought to have measured 6 m (20 ft). Goblin sharks are benthopelagic creatures that inhabit upper continental slopes, submarine canyons, and seamounts throughout the world at depths greater than 100 m (330 ft), with adults found deeper than juveniles. Some researchers believe that these sharks could also dive to depths of up to 1,300 m (4,270 ft), for short periods of time.
Chimaeras are cartilaginous fish in the order Chimaeriformes, known informally as ghost sharks, rat fish, spookfish, or rabbit fish; the last three names are not to be confused with rattails, Opisthoproctidae, or Siganidae, respectively.
The leafscale gulper shark is a dogfish of the family Centrophoridae. C. squamosus is reported to have a lifespan of approximately 70 years, based on otolith ring counts. It was the first described species in the genus Centrophorus, which now contains 13 species.
The Australian ghostshark is a cartilaginous fish (Chondrichthyes) belonging to the subclass Holocephali (chimaera). Sharks, rays and skates are the other members of the cartilaginous fish group and are grouped under the subclass Elasmobranchii. Alternative names include elephant shark, makorepe, whitefish, plough-nose chimaera, or elephant fish. It is found off southern Australia, including Tasmania, and south of East Cape and Kaipara Harbour in New Zealand, at depths of 0–200 m (0–656 ft). Despite several of its names, it is not a shark, but a member of a closely related group.
The pale ghost shark is a shortnose chimaera of the family Chimaeridae. It is endemic to New Zealand waters.
Apristurus is a genus of catsharks, the family Scyliorhinidae, commonly known as the ghost or demon catsharks.
The longnose velvet dogfish is a sleeper shark of the family Somniosidae, found circumglobally in southern hemisphere subtropical seas, at depths of between 230 and 1,500 m. It reaches a length of 130 cm. It has a diet consisting of predominantly mesopelagic fishes and squids.
The bulldog catshark is a catshark of the family Scyliorhinidae, found in the deep waters of the East China Sea and in the Northwest Pacific. In New Zealand waters it is found at the Reinga Ridge, the West Norfolk Ridge, the Hikurangi Trough and the Chatham Rise as well as on the Campbell Plateau.
The southern lanternshark is a shark of the family Etmopteridae found in the southeast Pacific between latitudes 29°S and 59°S, at depths of between 220 and 1,460 m. This species has been found off Northland, off the Chatham Islands, on the Campbell Plateau, all in New Zealand waters. Its length is up to 60 cm. Reproduction is ovoviviparous, with 10 to 13 pups in a litter, length at birth about 18 cm. They exhibit bioluminescence.
The roughskin catshark is a species of catshark in the family Scyliorhinidae found near Australia and New Zealand. Its natural habitat is the open seas. This species belongs to a genus of poorly known deep-water catsharks.
The carpenter's chimaera, also known as the giant chimaera or the giant purple chimaera, is a species of fish in the family Chimaeridae.
The leopard chimaera, Chimaera panthera, is a species of fish in the family Chimaeridae endemic to New Zealand. Its natural habitat is open seas. This species is considered rare and any specimens obtained should be sent to the New Zealand National Fish Collection at the Museum of New Zealand Te Papa Tongarewa.
The smallspine spookfish is a species of fish in the family Rhinochimaeridae with a rather disjunct population. Its natural habitat is open seas.
Harriotta is a genus of cartilaginous fish in the family Rhinochimaeridae.
The southern sleeper shark, or Whitley's sleeper shark, is a deepwater benthopelagic sleeper shark of the family Somniosidae found in the southern and subantarctic extremes of the Atlantic, Indian and Pacific Oceans, and some northern reaches of the Antarctic oceans. It has been recorded near the southernmost areas of South America, near South Africa, southern Australia, Tasmania and New Zealand, as well as more remote locations in the south-central Indian Ocean.
The Rhinochimaeridae, commonly known as long-nosed chimaeras, are a family of cartilaginous fish. They are similar in form and habits to other chimaeras, but have an exceptionally long conical or paddle-shaped snout. The snout has numerous sensory nerve endings, and is used to find food such as small fish. The first dorsal fin includes a mildly venomous spine, used in defense.
Chimaera is the type genus of the cartilaginous fish family Chimaeridae.
The longnose deep-sea skate is a large skate in the family Arhynchobatidae. It was first described in 1985 from specimens collected near New Zealand. It is known to be a deep-water skate, however lack of research trawls at depths past 1500 meters limits knowledge of the depths where the species can be found. The species is dark brown or grey, with an eponymous elongated snout. The species has been measured to be a maximum of 140 cm in total length, although size variation and growth patterns are not known.
Rhinochimaera pacifica, commonly known as the Pacific spookfish, knifenose chimaera, narrownose chimaera, Pacific long-nosed chimaera, or Pinocchiofish, is a species of chimaera in the family Rhinochimaeridae. It lives in various parts of the Pacific Ocean and can be characterized by its long snout.