5. There are Seahorses in the Hudson River

Now that we know that the Hudson River is partly an estuary, it makes sense that its waters are home to over 200 species of fishes — some more abundant than others. This list includes the Northern Pike, Striped Searobin, Naked Goby, Lined Seahorse and the occasional Humpback whale that likes to stray from the ocean. Moving upriver, the Department of Environmental Conservation notes that the salinity decreases, giving away to freshwater species like black bass and sunfish. The river’s signature fish is the Atlantic Sturgeon, which may live more than 60 years and grow up to 14 feet in length.