night zoo keeper

My animal has black and white polkadots.It eats fish and seeds.It lays eggs and it goes splash.It doesn't travel in a group.It feels hairy.Its as big as a cheetah.It lives in a nest with water.It has a tail and also has a tail.And also has a long beak.Its gray with 2 small eyes.Sometimes you must see it close to the shore.It also loves to walk.    Whats my animal?