The amphibious species (frogs and newts) feed on the insects and worms that dwell within the habitat, and the mammals tend to prefer fish and other creatures that live exclusively in the water. These habitats are perfect for creatures that don't like large bodies of water, and also like to come on land and be safe from predators; there are a lot of hiding spaces (logs, large rocks, and trees) both in and out of the water.
Cameroon clawless otter
North american otter
La plata otter
Indian smooth-coated otter
Giant brazilian otter
Dugongs, manatees, and sea cows
Read more at the list of biomes of the world...