neaptide Sea phenomenon Twice-a-month shore occurrence Twice-a-month event Sort of sea current Smallest rise and fall of sea level Semimonthly phenomenon Low-range sea change Low monthly fluctuation of the sea First-quarter lunar phenomenon Sea current First or third quarter phenomenon Semimonthly ocean occurrence This is smaller than 36 Across One concern of a skipper Ocean current Shore phenomenon A little current news not half fitting I would speculate, ultimately Ocean occurrence