Make a fishing/feeding lure/stick.
Find a small diameter dowel or simply use a chopstick. Using a glue stick or coral glue; attach a length of fishing line to one end.
You can now thread a small piece of table shrimp, silverside, scallop, etc to the fishing line.
Dangle and tease the hungry angler by waving the morsel of food in front of it gently.
Sooner or later; when it's hungry enough it'll lunge for it.
It's worked on anglers, scorpions, lionfish, frogfish, waspfish...and pretty much any fish that would hurt me if it inadverantly pierced my skin.
If you've fed it and know it ate.....it can go safely 1 week without a meal. I would be surprised if it couldn't go past 2 weeks without a meal.