On top of that, it's unlocked and very compact. In testing around the San Francisco Bay Area, the MiFi 6620L performed very well, with excellent 4G LTE Internet speed. But all of that comes at a high price. The Jetpack costs $200, or $50 if you're willing to sign up for a two-year contract.
Rays account for about half of all elasmobranch species. Of the 500 or more described ray species, there are over 150 stingray species that are assigned to approximately 20 genera. Freshwater stingrays of the family Potamotrygonidae are assigned to the genera Paratrygon, Plesiotrygon, Heliotrygon and Potamotrygon.
Stingrays Photograph by David Doubilet, National Geographic. Two stingrays cruise through crystal-clear waters near Grand Cayman. Like their close relatives the sharks, the 200-odd species of stingrays are boneless fish that boast skeletons made of tough tissue called cartilage. Some stingrays are bottom feeders and dine on crabs, clams, shrimp, and worms. Other species, like the devil rays, feed on plankton strained from ocean waters. Cownose Ray Photograph by Mike Theiss, National Geographic. A cownose ray shows off its good side in an exhibit tank at Orlandoâs SeaWorld park.