Answer:
The marine dwelling giant otter is largest in the mustelidae family weighing between 32 and 45.3 kilograms (70-100 pounds) for males and 22 and 26 kg (48-57 lbs) for females.
The wolverine is the largest of terrestrial in the mustelidae family. An adult wolverine is about the size of a medium dog, with a length usually ranging from 65 - 87 cm (25 - 34 inches), a tail of 17 - 26 cm (7 - 10 inches), and a weight of 10-25 kg (22 - 55 lb), though exceptionally large males can weigh over 31 kg (70 lb)