The distribution of acute copper saltwater toxicity data from 57 species is shown in Figure 3. As reported for the acute copper freshwater toxicity studies, most of the data were available for benthos and fish. Acute copper toxicity values ranged from 1.2 mg/L for a bivalve [13] to 346,700 mg/L for a crab species [56]. The fish families with the species most sensitive to saltwater copper exposure were Pleuronectidae, Antherinidae, and Moronidae.