It's frequently a common denominator, but it's not the sole source.
There are two in Newfoundland that I can mention. We've already discussed the Eastport example, which is really about protecting an area for lobster reproduction. In Gilbert Bay, in Labrador, it's a type of red cod that's being protected, so it's not the bottom features. Those would be two examples, and there may be others.
I think it's fair to say that quite often there is a sensitive benthic area as well.