Tracy, cormorants are bad. I didn't realize how bad until I did a fish survey on a 7/8 acre pond a year ago. It had 3-5 cormorants visiting daily. I didn't think they would do too much damage because the visibility was 12" or so due to a thick phytoplankton bloom.
I was wrong.
80% of the fish that I sampled showed that they escaped from a cormorant. It didn't matter what species, all had marks on them from the birds. Scales removed, scrapes, fins torn, etc.
