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Bluntnose Stingrays, Dasyatis say

Bluntnose StingraysBluntnose StingraysContribute Photos or VideoContribute Photos or Video

Description & Behavior

Bluntnose stingrays, Dasyatis say (Lesueur, 1817), are beautiful mid-sized rays that measure up to 100 cm in length from their short, blunt snouts to the end of their bodies and they can weigh up to about 20 kg. Their disk has rounded corners, few tubercles and spines along their midline. There is a fold on the upper and lower surface of the tail. They are yellow or light brown on the dorsal (upper) side, white on the ventral (under) side.

World Range & Habitat

Bluntnose stingrays are found in the western Atlantic: from New Jersey, USA and the northern Gulf of Mexico to southern Brazil, including the Antilles. Inhabits coastal waters, close to shore in depths of about 10 m.

Feeding Behavior (Ecology)

This species feeds mainly on bivalves and worms but also eats shrimps, crabs, and small fishes. They feed by flapping their wings to create depressions in the sand, which exposes invertebrates and small fishes. Their predators include the bull shark.

Life History

Bluntnose stingrays are ovoviviparous, reproducing via internal fertilization. There is a distinct pairing with embrace; the male mounts the female on the dorsal (upper) side.

Ovoviviparous: eggs are retained within the body of the female in a brood chamber where the embryo develops, receiving nourishment from a yolk sac. This is the method of reproduction for the "live-bearing" fishes where pups hatch from egg capsules inside the mother's uterus and are born soon afterward. Also known as aplacental viviparous.

Conservation Status & Comments

Bluntnose stingrays have been found near cleaning stations where they are attended to by the bluehead wrasse and Spanish hogfish. They have a well-developed serrated spine and are capable of inflicting a painful laceration. They have been known to cause injury to swimmers.

References & Further Research

Research Dasyatis say » Barcode of Life ~ BioOne ~ Biodiversity Heritage Library ~ CITES ~ Cornell Macaulay Library [audio / video] ~ Encyclopedia of Life (EOL) ~ ESA Online Journals ~ FishBase ~ Florida Museum of Natural History Ichthyology Department ~ GBIF ~ Google Scholar ~ ITIS ~ IUCN RedList (Threatened Status) ~ Marine Species Identification Portal ~ NCBI (PubMed, GenBank, etc.) ~ Ocean Biogeographic Information System ~ PLOS ~ SIRIS ~ Tree of Life Web Project ~ UNEP-WCMC Species Database ~ WoRMS

Search for Bluntnose Stingrays » ARKive ~ ~ Bing ~ dmoz ~ Flickr ~ Google ~ NatureFootage ~ Picsearch ~ Wikipedia ~ Yahoo! Images ~ YouTube

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