The Fins United Initiative is excited to showcase a BRAND NEW section to our program: the "Bite into Research" segment! TFUI officers will be reading articles that were published in regards to Chondrichthyans (those are the sharks, skates, rays, and chimaeras... and include any sector) and explain it in terms that everyone can understand. Today, we have TFUI Officer Chelsea Stein reviewing the following paper: Genetic diversity and connectivity of the megamouth shark.
Did you know there are stingrays that solely live in freshwater? Yup! Potamotrygon is a whole entire genus of freshwater stingrays that are native to the rivers of South America. You may have actually even seen some in an aquarium once or twice. Like other stingrays, they do have venomous barbs at the base of their tails, with the barbs being dangerous to humans.
So which species in this genus are we talking about? Welcome Potamotrygon limai, also known as the Zé Lima river stingray.
Milk sharks (Rhizoprionodon acutus) are ground sharks in the Rhizoprionodon genus that can be found worldwide from West Africa to the southern parts of Japan. These sharks with a long, narrow snout and big eyes are grey-brown in colour that gives way to a creamy underbelly. Their caudal (tail) fin usually has a dark margin and white margins around their pectoral (side) fins. They prefer shallow water and feed on small pelagic and benthic bony fishes, cephalopods and other invertebrates in this area. While it provides some good noms, but with them straying no deeper than 200 metres, it does make them vulnerable to fisheries.
TFUI Founder Melissa C. Marquez is author of all animal bios and "Behind the Fins" segments.
SEE MELISSA'S TEDx TALK HERE:
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