The fish tank had sensors connected to a PC that regulated the temperature, food and cleanliness of the tank.
"Somebody got into the fish tank and used it to move around into other areas (of the network) and sent out data," said [someone who, with a straight face, calls themself] director of cyber intelligence.
The casino's name and the type of data stolen were not disclosed in the report for security reasons, he said. The report said 10 GB of data were sent out to a device in Finland.
This story has the traditional structure of every urban legend ever, and appears to be sourced to a single press release by company who sell anti-malware software, making it even more suspect. But, it sounds "truthy".
The Mosaic Communications Fishcam was never compromised, for the record.