Is the Hudson river a at all?

Yes, the Hudson River is an estuary. It is a partially enclosed coastal body of water where seawater mixes with freshwater from rivers. Estuaries are formed where rivers meet the sea, and they are often home to a wide variety of plants and animals. The Hudson River is one of the largest estuaries in the United States, and it is home to over 200 species of fish. The river is also an important migration route for birds, and it is home to several species of endangered plants and animals.