Answer:
Long and slinky like a trout, never sings till it's guts come out.
So cold, damp and dark this place. To stay you would refrain, yet those who occupy this place do never complain.
What runs around all day. Then lies under the bed. With its tongue hanging out?
I work when I play and play when I work.
What is full of holes, but can still hold a lot of water?
Describes a mysterious region and a stylish pair of shorts.