Pose a riddle based on the following information. Output the riddle.
A small creature that lives in water
What has gills to breathe and a tail to steer, is at home in the water and has fins to steer?
Complete the following task based on the instruction and optional input provided.### Instruction:
Pose a riddle based on the following information. Output the riddle.

### Input:
A small creature that lives in water

### Output:
What has gills to breathe and a tail to steer, is at home in the water and has fins to steer?