233,000 gallons of molasses were spilled into Honolulu harbor on Monday. It has killed all the marine life.
When oil spills, the oil floats on top of the water, and is relatively easy to clean up. Molasses sinks to the bottom of the ocean, is impossible to get to, sucks up all the oxygen, and kills everything.
People are advised to stay out of the water. The molasses in the water does not pose a threat by itself. But the dead sea animals may attract sharks.
The company responsible, Matson Inc., says it "regrets that the incident
impacted many harbor users as well as wildlife. We are taking steps to
ensure this situation does not happen again."
for more information: http://www.npr.org/blogs/thetwo-way/2013/09/12/221709158/massive-molasses-spill-devastates-honolulu-marine-life