Shad Fishing at Gloucester on the Deleware River Thomas Eakins (1844-1916)

The picture has something of this: people, water, transportation system, watercraft, vehicle, river, group, man, fisherman, recreation, mammal, riverbank, military, canoe, wear, weapon, rowboat, child.
Perhaps it’s a painting of a group of people standing on a beach next to a body of water with a boat in the water and people standing.