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.
They migrate twice yearly: north in late spring (as pictured here) and south in late autumn. There are around 70 species of stingray in the world's oceans, but these cow-nose rays (Rhinoptera bonasus) have distinctive, highdomed heads, giving them a curiously bovine appearance.hey migrate long distances, and can be found as far south as the Caribbean and as far north as New England. They use their extended pectoral fins to swim, and often turn upside down, curling their fin tips above the surface of the water-leaving terrified swimmers convinced that they have seen a shark.