Hundreds of Dead Dolphins Off the Coast of Zanzibar.

Water turns red with blood as four hundred bottleneck dolphins lie dead or dying on the shore of Zanzibar on Saturday April 29, 2006. Although the exact cause is still a mystery, scientists are surmising that a loud burst of sonar was the cause:

Some scientists surmise that loud bursts of sonar, which can be heard for miles in the water, may disorient or scare marine mammals, causing them to surface too quickly and suffer the equivalent of what divers call the bends - when sudden decompression forms nitrogen bubbles in tissue.

A U.S. Navy task force patrols the coast of East Africa as part of counterterrorism operations. A Navy official was not immediately available for comment, but the service rarely speaks about the location of submarines at sea.

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