What notes are in the B flat scale for contrabass clarinet?

Question:same as a regular Bb clarinet and bass clarinet
C,D,E,F,G,A,B,C

Best Answer - Chosen by Asker: same as a regular Bb clarinet and bass clarinet
C,D,E,F,G,A,B,C

whats a contra bass clarinet?

I have no idea, but I'm posting this because I'm curious myself. Is that the big clarinet thats curved and shaped like a saxophone?

Same as every other b-flat instrument. A b-flat instrument will play a C major scale to sound a concert b-flat scale because it transposes.
The fingerings are the same as the bass clarinet, soprano clarinet, e-flat clarinet, alto clarinet....