Shop › Open Wide Image 1 of 1 Open Wide from $130.00 Hippos are the second most deadly animal in Africa, behind the mosquito. 50 km/h on land, 20 km/h under water, and this mouth�it adds up. Size: Select Size Small Medium Large Frame: Select Frame White Black Oak Quantity: Purchase Added! Hippos are the second most deadly animal in Africa, behind the mosquito. 50 km/h on land, 20 km/h under water, and this mouth�it adds up.