In 1962 the state governments of New Jersey and Delaware had a baby. This baby was the Delaware River & Bay Authority by compact between the states of Delaware & New Jersey. Consequently a union flag of Delaware and New Jersey was one of the results. This flag has the seals of both state but slightly modified. New Jersey's shield is white instead of being blue. The flag is a seal within a seal. Or rather there are two seals that make up the larger seal. Outside the seals of Delaware and New Jersey are the two key points of connection between these two states. Above the the Delaware Memorial Bridge. Below the seals is the Cape May-Lewis Ferry.
New Jersey also has hybrid flags with Pennsylvania and New York. It makes so much sense for New Jersey to be connected to Delaware as well, since their settlement mother tongues were Swedish, Finnish, and Dutch. Only later did these two states learn English a bit later in their colonial life.