What fishes are safe to place in an aquarium together with an octopus?

What fishes are safe to place in an aquarium together with an octopus? The last thing I want is that the octopus eats the fish or vice versa.

(did I use vice versa right in this sentence?).

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).