A new seafood restaurant opens this month near Rittenhouse Square, serving up “contemporary coastal” flavors. Little Water opens Friday, Oct. 25, at 261 South 20th Street. It’s the second restaurant by husband-and-wife team Chef Randy Rucker – who was a semifinalist at this year’s James Beard Awards – and Amanda Rucker, who also run River Twice together. The new restaurant is a tribute to the Ruckers’ experiences living along the Gulf Coast and in the New England and Mid-Atlantic regions.