What do you get when you cross a fish tank with a computer?

You get a target for hackers:

Hackers are constantly looking for new ways to access people’s data.Most recently, the way was as simple as a fish tank.

The hackers attempted to acquire data from a North American casino by using an Internet-connected fish tank, according to a report released Thursday by cybersecurity firm Darktrace.

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 Justin Fier, Darktrace’s director of cyber intelligence. 

The Internet of Things and computer controlled everything is a bigger risk for corporations and governments, because they have more data that is worth stealing.  I know people who did "White Hat" penetration tests (hired by the Casino to check their security) who got into the main network via the Ethernet that was hooked up to the minibar in the room.  That was at least ten years ago