1.   Bay bottom.

2.   Brand said his latest research indicates that water on the bay bottom has indeed seeped up from underground.

3.   After spotting them on the bay bottom, we immediately stopped the boat and lowered the bait to the bottom, drifting it along.

4.   McClung, unable to rely on magnetometers because of iron deposits on the bay bottom, persuaded fishermen to drop marker buoys where they remembered pulling up broken clay.

5.   Salmon farms often draw environmental criticism because of the way the caged fish cover bay bottoms with excrement and sometimes breed disease.

6.   Survey researchers took samples of the sediment on the bay bottom near the Patuxent and Potomac rivers.