What are some of the things we come to know about otters from this text?

Otters belong to a comparatively small group of animals called Mustellines, shared by the badger, mongoose, weasel, stoat, mink and others. Maxwell’s otter was of a race previously unknown to science and was at length named by zoologists Lutrogale perspicillata maxwelli or Maxwell’s otter. They are found in large numbers in marshes. They are often tamed by the Arabs. It is characteristic of otters that every drop of water must be extended and spread about the place; a bowl must at once be overturned, or, if it would not be overturned, be sat in and splashed in until it overflowed. For them, water must be kept on the move. Otters love playing various games, especially with a ball.