Source : Webster's Revised Unabridged Dictionary (1913)

Shoaly \Shoal"y\, a.
   Full of shoals, or shallow places.

         The tossing vessel sailed on shoaly ground. --Dryden.

Source : WordNet®

shoaly
     adj : full of submerged reefs or sandbanks or shoals; "reefy
           shallows"; "shoaly waters" [syn: {reefy}, {shelfy}, {shelvy}]