Typical colonial morphology on TCBS Agar is as follows:
V. cholerae............................. Large yellow colonies.
V. parahaemolyticus............... Colonies with blue to green centers.
V. alginolyticus....................... Large yellow colonies.
Proteus/Enterococci................ Partial inhibition. If growth,
colonies are small and yellow to translucent.
Pseudomonas/Aeromonas...... Partial inhibition. If growth, colonies are blue.