Herd Of Otter. Otters Are Semi-Aquatic (Or In One Case Aquatic) Fish-Eating Mammals. The Otter Subfamily Lutrinae Forms Part Of The Family Mustelidae, Which Also Includes Weasels, Polecats, Badgers, As Well As Others. With Twelve Species In Seven Genera, Otters Have An Almost Worldwide Distribution. They Mainly Eat Aquatic Animals, Predominantly Fish And Shellfish, But Also Other Invertebrates, Amphibians, Birds And Small Mammals. Otters Have Long, Slim Bodies And Relatively Short Limbs, With Webbed Paws. Most Have Sharp Claws On Their Feet, And All Except The Sea Otter Have Long Muscular Tails. The Twelve Species Range In Adult Size From 0.7 To 1.8 Metres (2 To 6 Feet) In Length And 5 To 45 Kilograms (10 To 100 Pounds) In Weight. They Have A Very Soft, Insulated Underfur Which Is Protected By Their Outer Layer Of Long Guard Hair. This Traps A Layer Of Air, And Keeps Them Dry And Warm Under Water.

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