The angelfish will eat the black shell shrimp. Angelfish is a carnivorous fish, the main food is earthworms, small fish, shrimp and so on. If the breeding density is high, they are likely to eat black shell shrimp. Moreover, the angelfish's character is not gentle, with a certain sense of territory and aggression, if stimulated, it is easy to attack small organisms. The black shell shrimp is very small, about two or three centimeters, and its character is very gentle, resulting in no self-defense ability, so if you accidentally disturb the angelfish, it is easy to be attacked by angelfish, or even eaten as bait.
The adaptability of black shell shrimp is relatively strong, and its personality is relatively mild, so it can adapt to the living environment of angelfish. But the angelfish character is not docile, but also has a certain sense of territory, stimulated will attack small organisms, so the black shell shrimp is easy to attack. From this point of view, the two are not suitable for mixed culture.
Therefore, it is generally not recommended to raise angelfish and black shell shrimp together. If you must be mixed, you can set up more dense aquatic plants or shelter houses for black shell shrimp to avoid. This will reduce the chance of the black shell shrimp being eaten, but there is no guarantee that they will not be eaten.