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A stingray's barb (ruler in mm). The barb is covered with rows of flat spines, composed of vasodentin. Vasodentin is an incredibly strong cartilaginous material which can easily cut through flesh. The undersides of the spines contain two longitudinal grooves which run along the length of the spine and enclose venom-secreting cells.
The blade is often deeply barbed and usually breaks off in the wound. Surgery may be required to remove the fragments. [36] Fatal stings are very rare. [34] The death of Steve Irwin in 2006 was only the second recorded in Australian waters since 1945. [37] The stinger penetrated his thoracic wall and pierced his heart, causing massive trauma ...
One of the smallest stingray species, the Atlantic stingray attains a maximum length of 61 cm (24 in) and a weight of 4.9 kg (11 lb). [4] It has a spade-shaped pectoral fin disk 1.1 times as wide as long, with rounded corners and concave anterior margins. The snout is relatively long.
Deaths from stingray venom are rare, but the most notable example is “Crocodile Hunter” Steve Irwin, who died after a short-tailed stringray’s barb pierced his heart in 2006.
The round stingray (Urobatis halleri) or Haller's round ray and Little round stingray is a species of round ray, family Urotrygonidae, found in the coastal waters of the tropical and subtropical parts of the northeastern Pacific Ocean. It is a small, common ray that feeds mostly on benthic invertebrates.
Potamotrygon leopoldi is part of a species complex of blackish river rays with contrasting pale spots found in the Tapajós, Xingu and Tocantins basins [3]. River stingrays are almost circular in shape, and range in size from Potamotrygon wallacei, which reaches 31 cm (1.0 ft) in disc width, [9] to the chupare stingray (S. schmardae), which grows up to 2 m (6.6 ft) in disc width. [10]
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The ocellate river stingray (Potamotrygon motoro), also known as the peacock-eye stingray or black river stingray, is a species of freshwater stingray in the family Potamotrygonidae. It was the first species to be described in the family and is also the most widespread, ranging throughout much of the Río de la Plata , Amazon , Mearim and ...