id be scared for the porkey and the trigger. I dont even think that his spikes will protect him. Anglers should be kept in tanks by themselves or with fish much bigger than they are. In this case, their eyes are not bigger than their stomaches, they just have huge stomaches! They will eat a fish bigger than themselves. It will be possible though once the porkey gets larger. Some anglers like a wartskin only get about 4 inches. they are pretty expensive though.
as far as feeding goes. they are pretty much ambushers. so live food would be best....but unless you have any life saltwater feeder fish, youll be stuck feeding him damsels which will def add up. You could probably get him to eat stuff off of a feeding stick if you wave it in front of him.... dont know how much of the stick you will get back after every chomp though.
haha
good luck