Feeding fish too much of any food is dangerous to their physiology and metabolism. Angelfish are greedy when it comes to eating, so one needs to be especially careful. A hungry fish is a healthier fish (all else being equal).
As for bloodworms, this is not all that good a food for fish. It should only be offered once a week, as a treat rather than a staple. I would not put in more than a very few; thaw them first in a saucer of warm water. It might be advisable to hold off altogether, until the fish are eating prepared foods.
Newly acquired fish will be stressed, and will need to adjust to the new environment. They may or may not eat for a few days, I've seen both. Getting them on prepared foods first, which are much more nutritious, is beneficial. Black veil angelfish are commercially-raised fish as they do not occur in the wild, so there should be no problem with accepting prepared foods as might occur with wild-caught fish initially.
Leaving the food issue...you don't say if these two angelfish are a bonded/mated pair or not. If not, you may have trouble before long. Two males will undoubted squabble over their territory, and a territory for each of them usually means the entire tank. If they are male/female but not bonded, they may or may not bond so the same risk is present. Two females may get along, but some members have previously mentioned this not happening either.
Angelfish are shoaling fish that live in smallish groups and they establish their hierarchy within the group, and provided sufficient space is given them in the aquarium, the interactions will be normal (hopefully). Individual fish do not always fit the norm. A group of at least five is advisable, if tank space is adequate. OF course, a pair may form in time, and then need to be separated unless the tank is very large and nature can fairly comfortably act out..
Byron.
