Amphibious pets can be used both on land or underwater. There are four different families of Amphibious pets in Guild Wars 2: Bears, Devourers, Drakes and Felines. They are pets with ranged or AoE attacks, with heavy damage skills and a lot of health.
Family: Bear – high health, incoming damage reduction
 Arctodus |  Black Bear |  Brown Bear |  Murrelow |  Polar Bear |
Family: Devourer – ranged attacks, interrupting and poisoning nearby foe
 Carrion Devourer |  Lashtail Devourer |  Whiptail Devourer |
Family: Drake – AoE attacks
 Ice Drake |  Marsh Drake |  River Drake |  Salamander Drake |
Family: Feline – lowers the target’s defense, makes heavy damage
 Jaguar |  Jungle Stalker |  Lynx |  Snow Leopard |