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.