Image Courtesy Christina Obrecht Bullseye Round Stingray Urobatis concentricus Osburn & Nichols, 1916 Family Urotrygonidae Identification: Disc nearly rounded, anterior edges come together at the snout to form an obtuse angle. The distance from snout to mouth is equal to the distance from snout to eyes. At the tail end, moderately developed lateral folds extend backward towards a strong serrated spine. The caudal fin is oblong and rounded at the tip. Skin is smooth all over the body. Coloration is
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some reports extending the range of this species down to southern Mexico. Habitat: Commonly inhabits shallow reefs, bays, estuaries and along coastal shorelines; usually found on soft sandy or rocky bottoms. Biology: Very little is known about the biology of this species. Breeding aggregations have been observed at Isla Santa Inés. Its diet is reported to include small fishes and crustaceans. General Interest: There is no direct fishery, which targets U. concentricus, or other urobatid rays due to their small size. Incidental catches by shrimp trawlers are likely, however, there is no species-specific documentation on how many may be caught. The taxonomic status of urobatid rays in the eastern Central Pacific is currently unresolved. Urobatis concentricus is morphologically very similar to two other common species, U. halleri and U. maculatus, but differs primarily in coloration; Consequently, U. concentricus, U. halleri, and U. maculatus may all represent a single species. A detailed systematic examination of this group is sorely needed to resolve the status of these species. Given the uncertainty of the taxomonic status of this species and a lack of biological data the IUCN’s Red List of Threatened Species has assessed the species as Data Deficient Victoria Vásquez Pacific Shark Research Center Moss Landing Marine Laboratories
