Seth Green (March 19, 1817 – August 18, 1888) was an American pioneer in fish farming (pisciculture and aquaculture).

He grew up as an outdoor enthusiast in the small village of Carthage along the Genesee River near Rochester, learning fishing skills from his father and the local Seneca people.

When the financial Panic of 1837 severely affected the economy of Carthage, Green left home and decided to take up commercial fishing along the Genesee River.

They established a fish and game market in downtown Rochester, which he operated with his brother and partner, Monroe Green.

He and his fishermen survived many storms and hardships on Lake Ontario to supply the market with from 0.5 to 3 short tons (450 to 2,720 kg) daily.

[2] Based on his own observations, ancient writings on fish culture, and his experimentation along the Genesee River, Green pioneered a new method of fertilization he called "dry impregnation".

He kept his methods secret for many years while successfully and profitably raising Atlantic salmon and brook trout for market.

In 1867–1869 he experimented and pioneered methods to successfully propagate American shad in the Connecticut River near Holyoke, Massachusetts.

In 1868, working with like-minded New York sportsmen, especially Robert B. Roosevelt and ex-governor Horatio Seymour, he encouraged the state legislature to form a fishing commission.

[2] Between 1868 and 1875, the commission established a regular stocking program in the state's rivers and lakes, being supplied by Seth Green's hatchery in Caledonia.

The project was a complete success, and in 1873 the state offered a $50 reward for the first shad to be caught from Pacific Ocean tributaries.

In 1876, the U.S. Centennial Commission gave Seth Green a certificate of award at the International Exhibition held at Philadelphia.

[14] The New York State Department of Environmental Conservation operates a 46 foot (14 m), 50 short tons (45 t) research vessel on Lake Ontario named Seth Green.