I have been fishing the bay far more then 20 years and can remember years (a stretch in the mid sixties) when there was an explosion in the Ray population in the bay.Goose - I wonder how the clam population is ? I know price of razor clams is sky high. This might force the rays to look at other food sources.
Other thing not mentioned is how badly the rays can stir up the shallow waters as they root for food.
I might be way off but I see too many rays as bad news for our bay. I think if you ask anyone with 20 or more years on the bay - they'll tell you how the ray population has exploded.