Hippopotamus

The hippopotamus is a large, mostly plant-eating African mammal whose name is Greek for "river horse". However, they are not horses nor pigs which is what they most closely resemble. Instead they are closest related to cetaceans, aka whales and dolphins.

Hippos are commonly associated with overweight and clumsy animals due to their size and bulk and are commonly selected for fursonas because of that by fat furs.