Singapore has been hit by a shortage of Koi following the KHV outbreak in Japan.
Japanese Koi now have to be kept in quarantine for three weeks instead of the usual seven days before going on sale.
The delay in deliveries has pushed prices up by 30-40%.
Some Singapore farms have temporarily stopped imports from Japan or have turned to other countries for supplies instead.
Japan has been in the grips of a Koi Herpes Virus epidemic since last year. Thousands of tonnes of fish have died or been culled in an attempt to control the outbreak.