The bass clarinet is one octave lower than the regular clarinet. The fingerings are exactly the same, however there is usually a low Eb key on a bass clarinet, and It has a bell that curves upwards...
The Bass Clarinet is probably easier to play than the regular Clarinet but, the Bass can be hard on you if you don't have enough air to play the lower notes.
The first clarinet was created when someone added a register key to a baroque instrument called the "chalumeau", which was a recorder-like instrument but had a reed attached to the mouthpiece. Adding...