what kind of fishes are found here?
American shad, striped bass, American eels, etc.
Hudson River
American shad are the only finfish harvested for profit, though in limited numbers.

Species include striped bass, the most important game fish in the Hudson. Estimates of the striped bass population in the Hudson range to nearly 100 million fish. American eels also live in the river before reaching breeding age; for much of this stage they are known as glass eels because of the transparency of their bodies. The fish are the only catadromous species in the Hudson's estuary.

The Atlantic tomcod is a unique species that adapted resistance to the toxic effects of the PCBs polluting the river. 
who is philip seymour hoffman? American actor, director, and producer. where was he born? Fairport, New York how was the early settlement like in this place? Village of Fairport was a swampy area within Perinton until the 1820s, when it was drained by Erie Canal. which two places are connected by the canal? Hudson River to Lake Erie. where does the former originate? Adirondack Mountains
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Hudson River [SEP] Fish
The fish are the only catadromous species in the Hudson's estuary. The Atlantic tomcod is a unique species that adapted resistance to the toxic effects of the PCBs polluting the river. Scientists identified the genetic mutation that conferred the resistance, and found that the mutated form was present in 99 percent of the tomcods in the river, compared to fewer than 10 percent of the tomcods from other waters. The hogchoker flatfish have been historically abundant in the river, where farmers would use them for inexpensive livestock feed, giving the fish its name. Other unusual fish found in the river include the northern pipefish, the lined seahorse, and the northern puffer.