Some of the most "fierce" members:
* Wolverines: Known for their strength and aggression, they're the largest members of the weasel family.
* Badgers: While not always considered fierce, they are known for their powerful claws and tenacious defense of their territory.
* Otters: Though adorable, river otters can be fierce hunters and have been known to fight off larger animals.
Other members of the weasel family:
* Weasels: These small, long-bodied animals are fierce hunters for their size.
* Ferrets: Domesticated ferrets are playful, but their wild ancestors are known for their hunting prowess.
* Minks: These semi-aquatic animals are adept at hunting fish and small mammals.
* Martens: Agile and acrobatic, these climbers can be quite aggressive when defending their territory.
So, depending on what you consider "fierce," there are many potential answers to your question!