Scientists usually measure shark age by counting growth rings in their vertebrae. These rings are often assumed to show age in the same way as the rings of a tree.Read more
In the study, the results of which was published in Scientific Reports, 129 samples were collected from markets and shops in Canada, China and Sri Lanka. The researchers then used DNA barcoding to identify the species.Read more
Their inky backs boldly patterned with white spots, spotted eagle rays are among the most graceful and photogenic fish in the sea. However, new research has revealed these striking patterns are not only beautiful but unique.Read more
These impulses are transmitted in complex patterns which researchers—after painstaking investigation aided by decoders and software from the intelligence community—have now demonstrated illicit an underlying grammatical structure not unlike that oRead more
The oceanic whitetip shark, porbeagle, both manta rays, and the smooth hammerhead are listed by IUCN as globally Vulnerable. The freshwater stingrays are considered Data Deficient.
Porbeagles are prized for meat as well as fins. Manta rays are increasingly targeted for their gill rakers, which are used in Chinese medicine. Freshwater stingrays are traded for display in aquariums.
The porbeagle proposal comes from the EU and is cosponsored by Brazil, Comoros, and Egypt. Ecuador has put forth the mantas while Colombia has proposed the freshwater stingrays.Read more