what is the average size of a sea otter
Sea otter The sea otter (Enhydra lutris) is a marine mammal native to the coasts of the northern and eastern North Pacific Ocean. Adult sea otters typically weigh between 14 and 45 kg (31 and 99 lb), making them the heaviest members of the weasel family, but among the smallest marine mammals. Unlike most marine mammals, the sea otter's primary form of insulation is an exceptionally thick coat of fur, the densest in the animal kingdom. Although it can walk on land, the sea otter is capable of living exclusively in the ocean.
Great white shark In great white sharks, sexual dimorphism is present, and females are generally larger than males. Male great whites on average measure 3.4 to 4.0 m (11 to 13 ft) long, while females at 4.6 to 4.9 m (15 to 16 ft).[6] Adults of this species weigh 522–771 kg (1,151–1,700 lb) on average,[30] however mature females can have an average mass of 680–1,110 kg (1,500–2,450 lb).[5] The largest females have been verified up to 6.1 m (20 ft) in length and an estimated 1,950 kg (4,300 lb) in weight,[3][4][5] perhaps up to 2,268 kg (5,000 lb).[31] The maximum size is subject to debate because some reports are rough estimations or speculations performed under questionable circumstances.[32] Among living cartilaginous fish, only the whale shark (Rhincodon typus), the basking shark (Cetorhinus maximus) and the giant manta ray (Manta birostris), in that order, average larger and heavier. These three species are generally quite docile in disposition and given to passively filter-feeding on very small organisms.[30] This makes the great white shark the largest extant macropredatory fish. Great white sharks are at around 1.2 m (3.9 ft) when born, and grow about 25 cm (9.8 in) each year.[33]