Sponges are using toxins, mucus, shading and smothering to kill and then take over coral colonies in areas that have been over-fished, finds a new study.
A huge artificial reef made up of 1,000 concrete structures is being built off the coast of the Yucatan Peninsula in Mexico.
An Australian agency approves dumping as much as 3 million cubic meters of dredge waste in park waters.
Strange as it sounds, the deadly molasses spill in Honolulu harbor is not unique, and could take some time to clean up.
The quake caused landslides on the undersea slopes where the corals grew.
From corals to opossums - migrations are part of global change.
Oceanographers found that deforestation and fishing seem to have been causing changes in coral reef ecosystems since the early 1900's in the Caribbean off the coast of Panama.
Nine years after a boat mangled a coral reef near Key West, Florida, the reef is back and thriving.
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