Octopus As A Pet?

[plasticpig]

Does anyone have an octopus as a pet? Came across this YouTube video. They appear to be very intelligent and are absolutely fascinating to watch. Wondering how difficult they are to keep? How do you find one in a big tank if it's has gone into full stealth mode? as they appear to become totally invisible.

[plasticpig]

Yes fascinating. I wasn't actually planning on keeping one as a pet. Just curious to know difficult they are to keep. Found this site which seems pretty comprehensive in explaining how to keep them. They don't seem to live very long.