NEW YORK - (AP) - The Coast Guard says a nearly 10-mile-longribbon of red tide has been spotted in New York Harbor.

The agency says the outbreak of potentially harmful algae wasreported early Monday and confirmed by the New Jersey Department ofEnvironmental Protection. DEP representatives didn't immediatelyrespond to telephone and e-mail messages on the Labor Day holiday.

Authorities say swimmers and boaters should avoid contact withthe reddish-brown sheen. It stretches from about the site of theIntrepid Sea, Air & Space Museum off Manhattan to Hoffman Island,off Staten Island.

Red tide is caused by naturally occurring algae that produce atoxin. It can cause temporary breathing trouble and other problemsif people ingest it and can make shellfish unsafe to eat.