[GIS] How to fill in a polygon with a lot of holes in it? Arcmap 10.3

Question

I have a lake map layer that mistook algae for land and now some of my lakes have a a lot of hole in them and I don't want these holes. I also don't want to delete Islands and I have a lot of lakes.

Answer 1

You can use Union and then make sure the "Gaps Allowed (Optional)" check box is unchecked.

This will fill in any instances of 'holes' within a polygon layer.