Tuesday 18 June
Bullseye round stingray (Urobatis concentricus)
Bullseye round stingray fact file
- Find out more
- Print factsheet
Bullseye round stingray description
Like other stingrays, the bullseye round stingray has a flattened body, with expanded pectoral fins that are fused with the body and head to form a round, flat disc (3). However, round stingrays differ from other stingrays in having a significantly shorter tail, about equal to the length of the disc, as well as a well-developed, rounded caudal fin. There are no dorsal fins (2) (4). As its common name suggests, the disc of the bullseye round stingray is roughly circular in shape, with a rounded snout, and is generally light grey with blackish blotches and spots arranged in concentric rows. Two yellowish or cream bands surround the disc (2) (5). The skin is smooth, without spines (2) (5), but a long, venomous spine is located approximately halfway down the length of the tail, and is used in defence (3) (4) (6).
- Also known as
- Bullseye stingray, concentric stingray, reef stingray, reticulated round ray, spot-on-spot round ray.
- Urolophus concentricus.
- Raie Ronde Concentríque.
- Raya Redonda De Manchas. Top
- Save Our Seas Foundation:
- IUCN Shark Specialist Group:
- Shark Research Institute:
- Shark Trust:
- In the fishing industry, the part of the catch made up of non-target species.
- Caudal fin
- The tail fin of a fish.
- Diverse group of arthropods (a phylum of animals with jointed limbs and a hard chitinous exoskeleton) characterised by the possession of two pairs of antennae, one pair of mandibles (parts of the mouthparts used for handling and processing food) and two pairs of maxillae (appendages used in eating, which are located behind the mandibles). Includes crabs, lobsters, shrimps, slaters, woodlice and barnacles.
- Dorsal fin
- The unpaired fin found on the back of the body of fish, or the raised structure on the back of most cetaceans.
- The state of being pregnant; the period from conception to birth.
- Animals with no backbone, such as insects, crustaceans, worms, molluscs, spiders, cnidarians (jellyfish, corals, sea anenomes), echinoderms, and others.
- A diverse group of invertebrates, mainly marine, that have one or all of the following; a horny, toothed ribbon in the mouth (the radula), a shell covering the upper surface of the body, and a mantle or mantle cavity with a type of gill. Includes snails, slugs, shellfish, octopuses and squid.
- Pectoral fins
- In fish, the pair of fins that are found one on each side of the body just behind the gills. They are generally used for balancing and braking.
- The science of classifying organisms, grouping together animals which share common features and are thought to have a common ancestor.
- IUCN Red List (July, 2009)
- Allen, G.R. and Robertson, D.R. (1994) Fishes of the Tropical Eastern Pacific. University of Hawaii Press, Honolulu, Hawaii.
- Campbell, A. and Dawes, J. (2004) Encyclopedia of Underwater Life. Oxford University Press, Oxford.
- Round Stingray Biological Profile, Ichthyology Department, Florida Museum of Natural History (July, 2009)
- Castro-Aguirre, J.L. and Pérez, H.E. (1996) Listados Faunísticos de México. VII. Catálogo Sistemático de las Rayas y Especies Afines de México (Chondrichthyes: Elasmobranchii: Rajiformes: Batoideiomorpha). Instituto de Biología, Universidad Nacional Autónoma de México, Mexico.
- ReefQuest Centre for Shark Research (July, 2009)
- Goodson, G. (1988) Fishes of the Pacific Coast: Alaska to Peru, including the Gulf of California and the Galapagos Islands. Stanford University Press, Palo Alto, California.
- McCourt, R.M. and Kerstitch, A.N. (1980) Mating behavior and sexual dimorphism in dentition in the stingray Urolophus concentricus from the Gulf of California. Copeia, 4: 900 - 901.
- Ebert, D.A. (2003) Sharks, Rays, and Chimaeras of California. University of California Press, Berkeley.
- view the contents of, and Material on, the website;
- download and retain copies of the Material on their personal systems in digital form in low resolution for their own personal use;
- teachers, lecturers and students may incorporate the Material in their educational material (including, but not limited to, their lesson plans, presentations, worksheets and projects) in hard copy and digital format for use within a registered educational establishment, provided that the integrity of the Material is maintained and that copyright ownership and authorship is appropriately acknowledged by the End User.
Bullseye round stingray biology
Almost nothing is known about the biology and life history of this stingray (1). However, like other stingrays, it is likely to be ovoviviparous, meaning the eggs hatch inside the female and the young are born live (4) (6). Reproduction in this species may be similar to the closely related U. halleri, which mates during the winter, and gives birth to three to six young, after a gestation period of around three months (4). As in many rays and skates, the male bullseye round stingray has much more pointed, curved teeth than the female, an adaptation thought to aid the male in grasping the female’s pectoral fins during copulation (8).
Most stingrays spend a lot of time camouflaged on the sea bed, often partially buried, but can swim rapidly when disturbed or when pursuing prey (3). The diet typically includes bottom-dwelling invertebrates, such as crustaceans, molluscs and worms, and small fish. Prey may be exposed by using the pectoral fins and snout to scoop out holes in the sea bed (3) (4). Although not fatal to humans, the venomous tail spine can cause painful wounds if this stingray is stepped on or disturbed (3) (4) (9).Top
Bullseye round stingray rangeTop
Bullseye round stingray habitatTop
Bullseye round stingray status
Classified as Data Deficient (DD) on the IUCN Red List (1).Top
Bullseye round stingray threats
Round stingrays are generally of little commercial value (9), mainly as a result of their small size (1). However, the bullseye round stingray is occasionally taken as bycatch in other fisheries. When caught, it is not usually retained, but the tail is often cut off before returning the stingray to the sea, probably resulting in high mortality (1). The restricted range of the bullseye round stingray may make it particularly vulnerable to any threats, but the lack of available information on its biology, abundance and taxonomy, and on the levels of bycatch, make assessing its conservation status difficult (1).Top
Bullseye round stingray conservation
There are no conservation measures currently in place for the bullseye round stingray. The IUCN recommend that a management plan is required for the conservation and sustainable management of all shark and ray species in Mexico, and investigations are underway to clarify whether the bullseye round stingray is indeed a full species (1). Further research is urgently needed into the biology, abundance and conservation status of this little-known stingray before it can be better protected.Top
Find out more
To find out more about the conservation of sharks and rays see:
AuthenticationThis information is awaiting authentication by a species expert, and will be updated as soon as possible. If you are able to help please contact: email@example.comTop
MyARKive offers the scrapbook feature to signed-up members, allowing you to organize your favourite ARKive images and videos and share them with friends.
Terms and Conditions of Use of Materials
Copyright in this website and materials contained on this website (Material) belongs to Wildscreen or its licensors.
Visitors to this website (End Users) are entitled to:
End Users shall not copy or otherwise extract, alter or manipulate Material other than as permitted in these Terms and Conditions of Use of Materials.
Additional use of flagged material
Green flagged material
Certain Material on this website (Licence 4 Material) displays a green flag next to the Material and is available for not-for-profit conservation or educational use. This material may be used by End Users, who are individuals or organisations that are in our opinion not-for-profit, for their not-for-profit conservation or not-for-profit educational purposes. Low resolution, watermarked images may be copied from this website by such End Users for such purposes. If you require high resolution or non-watermarked versions of the Material, please contact Wildscreen with details of your proposed use.
Creative commons material
Certain Material on this website has been licensed to Wildscreen under a Creative Commons Licence. These images are clearly marked with the Creative Commons buttons and may be used by End Users only in the way allowed by the specific Creative Commons Licence under which they have been submitted. Please see http://creativecommons.org for details.
Any other use
Please contact the copyright owners directly (copyright and contact details are shown for each media item) to negotiate terms and conditions for any use of Material other than those expressly permitted above. Please note that many of the contributors to ARKive are commercial operators and may request a fee for such use.
Save as permitted above, no person or organisation is permitted to incorporate any copyright material from this website into any other work or publication in any format (this includes but is not limited to: websites, Apps, CDs, DVDs, intranets, extranets, signage, digital communications or on printed materials for external or other distribution). Use of the Material for promotional, administrative or for-profit purposes is not permitted.