Sentence:  'Twas early June, the new grass was flourishing everywheres, the posies in the yard—peonies and such—in full bloom, the sun was shining, and the water of the bay was blue, with light green streaks where the <WSD>shoal</WSD> showed. 
Meaning of the word marked with <WSD> tags:  A sandbank or sandbar creating a shallow.