Petroleum Comparison?

A large oil spill that resulted from the 1989 shipwreck of the Exxon Valdez caused considerable damage to Alaska's wildlife. Do you think a comparable spill of water-insoluble liquid that had a density of 1.20 g/mL would have been as harmful to waterfowl and aquatic mammals, uming that the toxicity of the liquid was comparable to that of petroleum? Explain your answer.