A fluid pollution prevention system for preventing the discharge of hazardous waste from a bilge of a marine vessel. The system includes an continuous sidewall that defines a vertically enclosed volume. When positioned within a bilge, the sidewall forms a barrier to petrochemicals floating on a fluid surface within the bilge. An opening near a base of the sidewall permits fluid from beneath the fluid surface to enter the vertically enclosed volume. Such fluid is substantially free of petrochemicals and may be removed form the vertically enclosed volume. Accordingly, by pumping fluid out of the enclosed volume, fluid may be removed form the bilge substantially free of petrochemicals. In one arrangement, the vertically enclosed volume may be sized to receive a bilge pump.