Lumps of iron and manganese ore called ________ can be harvested from the seafloor near underwater volcanoes. Coral in the ocean has been significantly damaged from _______, which increases ocean acidity. Coral reefs lose their color through a process known as _______. _______ are the organisms that live in a mutualistic relationship with coral. The disaster of an oil spill in the Gulf of Mexico occurred on the _______. The nodules that serve as an important habitat for marine life are _______.
