The relationship between extensive death of larvae of abalone Haliotis divesicolor Reeve and number of bacteria

The number of bacteria in the pool and on the attachment film were monitored. Before and after extensive death of larvae of abalone occurred, the number of bacteria in the pool and on the attachment film was 200 times higher than that in initial stage, the number of bacteria did not changed after the water was utilized by ozone, the death of abalone occurred either, the extensive death occurred about one week after the juvenile abalone detached. The bacteria separated before and after the extensive death of juvenile abalone were Vibrio tubiashii and Vibrio sp.