The US Coast Guard is looking into the potential of a second oil leak off the coast of Southern California, where a pipeline ruptured recently, spilling petroleum into the ocean.

Coastal businesses took a blow, while environmentalists are concerned about the spill's long-term effects on vulnerable wetland regions and animals.

The week after the spill, more than four dozen creatures, primarily birds and fish, were discovered dead, but none were oiled.

The cause of the leak, which happened eight months after the anchoring impact, remains unknown.

Authorities are also investigating whether additional anchors struck the pipeline, weakening it, or whether the pipeline had a pre-existing issue.

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