This U.S. industry comprises establishments primarily engaged in the commercial catching or taking of finfish (e.g., bluefish, salmon, trout, tuna) from their natural habitat. Cross-References. Establishments primarily engaged in-- ? Farm raising finfish--are classified in U.S. Industry 112511, Finfish Farming and Fish Hatcheries; and ? Gathering and processing (known as "floating factory ships") seafood into canned seafood products--are classified in U.S. Industry 311711, Seafood Canning.