From the Summary: "In recent years, many people have become increasingly aware that the globalization of trade, the increased speed of travel, the massive volume of cargo shipments, and rising tourism have combined to increase the chance of accidental introductions of foreign species into the United States. Aquatic species arrive through a variety of mechanisms--unintentionally when attached to vessel hulls or carried in vessel ballast water and intentionally when imported for aquaria display, as live seafood for human consumption, or as a transplant to increase sport fishing opportunities. [...] This report provides background on various approaches to ballast water management and reviews current ballast water management laws and programs. This report will be updated as this issue evolves."
CRS Report for Congress, RL32344