Very nice job, Kyle! Beautiful shot!
Sad news, our hitchhiking octopus finally expired. It had stopped eating about 1 month ago, and floated up a couple of days ago. I was traveling, but my wife gave me the news. According to Richard & other various folks, octopi are pretty short-lived (1-2 year life span from egg to old age), so you never know how old the one you've got hitchhiking is.
I'm going to tear down the 5g nano now (home to 1 mantis, destined for the Great Toilet Bowl In The Sky. My wife is not at all squeamish about sending the bad crabs to the GTBITS).
If you can find a hitchhiking red emerald crab, toss it in the octopus tank. The octopus won't go for your goldfish. (Shouldn't feed freshwater fish to salwater animals anyway). You might try skewering a garbanzo-sized piece of raw shrimp or fish on a bamboo kabob skewer, and waving it in front of the octopus, in a dimly lit room. That's about the only way we could get our octopus to eat if he didn't hunt the emerald crabs.