How to use FOV

Educational Game for K-2nd Grades.
Take photos of animals to identify.

I am trying to create an in-game camera that can zoom into a targeted animal that only lists the animals in the in-game camera’s FOV. Using 90 degrees.

This all works except…

When a picture of an animal, say zebra is taken, there is only 1 zebra with a unique ID in the camera lens but it is listing all the zebras in the level and not just in the in-game camera’s FOV.

Having trouble need help.