The original purpose of the system was to provide domestic food fish to replace declining native fish populations. The role of the System has changed greatly over the past 30 years. Major responsibilities now include helping to recover species listed under the Endangered Species Act, restoring native aquatic populations, mitigating for fisheries lost as a result of federal water projects, and providing fish to benefit Indian Tribes and national wildlife refuges. The System is currently composed of 70 National Fish Hatcheries, 9 Fish Health Centers, 7 Fish Technology Centers, and a Historic National Fish Hatchery.[1]
