Vibrio cholerae 01 was detected from aquarium water and fish imported from Thailand and Srí Lanka. The infected fish were treated with antibiotics and the tanks and other aquatics were decontaminated. None of the persons taking care of the infected fish became ill; bacteriological analyses of fecal specimens of these persons were negative. The significance of the finding is discussed in view of possible transmission and incidence of cholera among aquarists in countries outside cholera endemic areas.

        Key words: Vibrio cholerae 01 – transmission – aquariums.