Spinetail mobula

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Spinetail mobula
Spinetail mobula osaka.jpg
Exhibited individuals at Osaka Aquarium
CITES Appendix II (CITES) [2]
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Superorder: Batoidea
Order: Myliobatiformes
Family: Mobulidae
Genus: Mobula
Species:
M. japanica
Binomial name
Mobula japanica
Synonyms
  • Cephaloptera japanica
  • Mobula japanica

The spinetail devil ray (Mobula japanica), also known as the spinetail mobula ray or Japanese mobula ray, is a species of pelagic marine fish which belongs to the family Mobulidae. It is found throughout the tropical and sub-tropical waters of the Indo-Pacific and eastern Atlantic Ocean.

Contents

Taxonomy

Some analyses suggest that the species should be considered conspecific with the devil fish (Mobula mobular). [3] [4] It is no longer recognised as a species by the IUCN.

Description

The spinetail mobula ray is a large ray which can grow up to a maximal width of 3.1 m (10 ft); average width is 2.3 m (7 ft 7 in). [5] [6] Like most rays, it is dorsoventrally flattened and has relatively large triangular pectoral fins on either side of the main body disc. At the front, it has a pair of cephalic fins which are forward extensions of the pectoral fins. These can be rolled up in a spiral for swimming or can be flared out to channel water into the ventral mouth when the animal is feeding.

The background body coloration of the dorsal side is deep blue-mauve with a large black band stretches from eye to eye. The ventral side is white. The inner surface of the cephalic fins are silver-grey with black tips, while the outer surface and side behind eye are white.

The species can be distinguished from other large rays by its projecting head, a white-tipped dorsal fin, a spine between the base of the dorsal fin and the start of the tail, and the length of its tail. Its spiracle is just above the area where the pectoral fin meets the body. [7]

Distribution and habitat

Little information exists about the distribution of this species. It is assumed to have a circumglobal distribution in tropical and temperate waters, both inshore and offshore and fully oceanic. The southern Gulf of California appears to be an important mating and pupping ground. [1]

Biology

The spinetail mobula ray has a pelagic lifestyle and has been observed both alone and in groups. It feeds on zooplankton by filtering sea water.

As all Mobulidae, species is ovoviviparous. After mating, the fertilized eggs develop within the female's oviduct. At first, they are enclosed in an egg case while the developing embryos feed on the yolk. After the egg hatches, the pup remains in the oviduct and receives nourishment from a milky secretion. [8] The pup is 70–85 cm in disc width at birth. [5]

Conservation status

In recent years, fishing for Mobulidae has received a significant boost by price increases for their gill rakers in the market for traditional Chinese medicine. In addition to targeted catches, the species is also subject to losses from bycatch, particularly in the gillnet fishery. As such sustained losses have a high impact on a species which has a low fecundity rate, a long gestation period with only a single offspring at a time, and late sexual maturity, the spinetail mobula ray has been classified as Endangered by the IUCN. [9]

Threats

The Spinetail Devil Ray, part of the Mobulid family, is threatened by both targeted and accidental capture in various fishing methods. Despite conservation efforts, global landings of these rays have risen due to gill plate demand. Additionally, habitat destruction and pollution pose indirect threats to their survival. [9]

Related Research Articles

<span class="mw-page-title-main">Manta ray</span> Subgenus of fishes

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Devil ray may refer to:

<span class="mw-page-title-main">Rajiformes</span> Order of fishes in the superorder Batoidea

Rajiformes is one of the four orders in the superorder Batoidea, flattened cartilaginous fishes related to sharks. Rajiforms are distinguished by the presence of greatly enlarged pectoral fins, which reach as far forward as the sides of the head, with a generally flattened body. The undulatory pectoral fin motion diagnostic to this taxon is known as rajiform locomotion. The eyes and spiracles are located on the upper surface of the head and the gill slits are on the underside of the body. Most species give birth to live young, although some lay eggs enclosed in a horny capsule.

<i>Mobula</i> Genus of cartilaginous fishes

Mobula is a genus of rays in the family Mobulidae that is found worldwide in tropical and warm, temperate seas. Some authorities consider this to be a subfamily of the Myliobatidae. Their appearance is similar to that of manta rays, which are in the same family, and based on genetic and morphological evidence, the mantas belong in Mobula.

<span class="mw-page-title-main">Izak catshark</span> Species of catshark, of the family Scyliorhinidae

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<span class="mw-page-title-main">Devil fish</span> Species of cartilaginous fish

The devil fish or giant devil ray is a species of ray in the family Mobulidae. It is currently listed as endangered, mostly due to bycatch mortality in unrelated fisheries.

<span class="mw-page-title-main">Longheaded eagle ray</span> Species of cartilaginous fish

The longheaded eagle ray is a species of eagle ray in the family Myliobatidae. The longheaded eagle ray, like other members of the genus Aetobatus, is characteristically different from other genera of eagle rays, distinguished by their notched nasal curtain; complete, singular set of upper and lower teeth; and v-shaped teeth in the lower jaw. It is found in the tropical and warm temperate Indo-West Pacific. It formerly included populations in the northwest Pacific, but these were recognized as a separate species, Aetobatus narutobiei, in 2013. Longheaded eagle rays are benthopelagic fishes that feed on crustaceans, cephalopods, echinoderms, and small bony fishes. It is a poorly known species, but generally uncommon and considered endangered by the IUCN.

<i>Mobula munkiana</i> Species of cartilaginous fish

Mobula munkiana, commonly known as the manta de monk, Munk's devil ray, pygmy devil ray, smoothtail mobula or Munk’s pygmy devil ray is a species of ray in the family Mobulidae. It is found in tropical parts of the eastern Pacific Ocean, ranging from the Gulf of California to Peru, as well as near offshore islands such as the Galapagos, Cocos, and Malpelo. Munk's devil ray was first described in 1987 by the Italian ecologist Giuseppe Notarbartolo di Sciara and named for his scientific mentor, Walter Munk.

<span class="mw-page-title-main">Chilean devil ray</span> Species of cartilaginous fish

The Chilean devil ray, also known as the box ray, greater Guinean mobula, sicklefin devil ray or the spiny mobula, is a species of ray in the family Mobulidae. It is often observed worldwide, basking just below the surface in tropical, subtropical and warm temperate oceans, mainly offshore, and occasionally appearing near the coast. It can reach a disc width of up to 3.7 m (12 ft).

<span class="mw-page-title-main">Bentfin devil ray</span> Species of cartilaginous fish

The bentfin devil ray, also known as the lesser devil ray, smoothtail devil ray, smoothtail mobula or Thurston's devil ray, is a species of ray in the family Mobulidae. It is found worldwide in tropical, subtropical and warm temperate oceans, with records from Australia, Brazil, Chile, Costa Rica, Ecuador, Egypt, El Salvador, Eritrea, Guatemala, Honduras, India, Indonesia, Ivory Coast, Japan, Malaysia, Maldives, Mexico, Myanmar, Nicaragua, Oman, Pakistan, Peru, the Philippines, Saudi Arabia, Senegal, South Africa, Sri Lanka, Thailand, United Arab Emirates, United States (California), Uruguay, Vanuatu and throughout the central and western Pacific. It likely occurs in many other locations in tropical, subtropical and warm temperate oceans. It is found both offshore and near the coast.

<span class="mw-page-title-main">Smalleye stingray</span> Species of cartilaginous fish

The smalleye stingray is a large species of stingray in the family Dasyatidae, measuring up to 2.2 m (7.2 ft) across. Rare but widely distributed, it is found in the Indo-Pacific from Mozambique to India to northern Australia. This species may be semi-pelagic in nature, inhabiting both deeper waters and shallow coastal reefs and estuaries. It is characterized by a diamond-shaped pectoral fin disc much wider than long, a tail that is broad and flattened in front of the spine but whip-like behind, and large white spots over its back.

<span class="mw-page-title-main">Giuseppe Notarbartolo di Sciara</span> Italian marine conservation ecologist (born 1948)

Giuseppe Notarbartolo di Sciara is an Italian marine conservation ecologist who has bridged the worlds of marine science, conservation and policy.

<span class="mw-page-title-main">Giant oceanic manta ray</span> Species of cartilaginous fish

The giant oceanic manta ray, giant manta ray, or oceanic manta ray is a species of ray in the family Mobulidae and the largest type of ray in the world. It is circumglobal and is typically found in tropical and subtropical waters but can also be found in temperate waters. Until 2017, the species was classified in the genus Manta, along with the smaller reef manta ray. DNA testing revealed that both species are more closely related to rays of the genus Mobula than previously thought. As a result, the giant manta was renamed Mobula birostris to reflect the new classification.

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<span class="mw-page-title-main">Mottled fusilier</span> Species of fish

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<span class="mw-page-title-main">Lunar fusilier</span> Species of fish

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<i>Caesio cuning</i> Species of fish

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References

  1. 1 2 White, W.T.; Clark, T.B.; Smith, W.D.; Bizzarro, J.J. (2006). "Mobula japanica". IUCN Red List of Threatened Species . 2006: e.T41833A10576180. doi: 10.2305/IUCN.UK.2006.RLTS.T41833A10576180.en .
  2. "Appendices | CITES". cites.org. Retrieved 2022-01-14.
  3. di Sciara, G. N.; Stevens, G.; Fernando, D. (2020). "The giant devil ray Mobula mobular (Bonnaterre, 1788) is not giant, but it is the only spinetail devil ray". Marine Biodiversity Records. 13 (1): 1–5. Bibcode:2020MBdR...13....4N. doi: 10.1186/s41200-020-00187-0 .
  4. Poortvliet, M.; Olsen, J.L.; Croll, D.A.; Bernardi, G.; Newton, K.; Kollias, S.; O’Sullivan, J.; Fernando, D.; Stevens, G.; Magaña, F.G.; Seret, B. (2015). "A dated molecular phylogeny of manta and devil rays (Mobulidae) based on mitogenome and nuclear sequences" (PDF). Molecular Phylogenetics and Evolution. 83: 72–85. Bibcode:2015MolPE..83...72P. doi:10.1016/j.ympev.2014.10.012. PMID   25462995.
  5. 1 2 Notarbartolo di Sciara, G. (1987). "A revisionary study of the genus Mobula Rafinesque, 1810 (Chondrichthyes: Mobulidae) with the description of a new species". Zoological Journal of the Linnean Society. 91 (1): 1–91. doi:10.1111/j.1096-3642.1987.tb01723.x.
  6. McEachran, J.D.; Notarbartolo di Sciara, G. (1995). "Mobulidae. Mantas, diablos". In W. Fischer; F. Krupp; W. Schneider; C. Sommer; K.E. Carpenter; V. Niem (eds.). Guia FAO para Identification de Especies para los Fines de la Pesca. Pacifico Centro-Oriental. Rome: FAO. pp. 759–764.
  7. "Mobula japanica". Encyclopedia of Life.
  8. Wourms, J.P. (1977). "Reproduction and development in chondrichthyan fishes". American Zoologist. 17 (2): 379–410. doi: 10.1093/icb/17.2.379 .
  9. 1 2 "IUCN updated assessment of the spinetail species".