This film was originally shot on 16mm film. The film was digitally converted to the 16:9 Apple Pro.Res Hi Def format so the very top and lower part of the format was sacrificed for the HD format. The era of this film was just following the discovery of the "Silent Spring" pesticides by Rachel Carson. The era and discovery of 'Salt Marshes" and their importance in the ecosystem was just the beginning of understanding the salt marshes. Today it is the restoration of these "nursery grounds" for the shrimp, crabs, lobsters, clams, oysters, and multitudes of fish species is without equal. The salt marsh ecosystem is one of the most productive and important ecosystems on earth.