shoals

Tokyo Bay is “a black expanse where gulls wheeled above drifting shoals of white Styrofoam.”

Hillary Clinton's campaign ran aground on the shallow shoals of "electability," and now Romney's yacht has done the same.

The presidential ambitions had fallen on rough shoals and it was, What do you do next?

Shoals of tunny-fish, (fish four and five feet long, and belonging to the dolphin tribe,) were seen tumbling about the ship.

Description of the shoals and reefs in the neighbourhood of the coasts of Australia.

The shoals on the west side are dangerous, and several vessels have been wrecked upon them in going in.

In Captain Cook's rough chart there is twelve fathoms marked between two shoals which must mean the above.

The cape is fronted by several rocky shoals, and ought not to be approached within four miles.