A 28-foot humpback whale spotted floating in the waters off Lloyd Harbor Saturday morning had suffered from blunt force trauma, according to a necropsy done Sunday.

"There is evidence of blunt force trauma on the right side of the whale's body. However,it will take several weeks for the exact cause of death to be determined," said Rachel Bosworth, a spokeswoman for the Riverhead Foundation for Marine Research and Preservation, in an email Sunday.

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"By analyzing documentation of the humpback whales recently spotted swimming in Western Long Island waters, the foundation will identify if this deceased whale is among the ones that had been sighted recently. This is the seventh large whale that has washed up in New York this year, five of which were humpback whales," the statement said.

The sighting was reported by the Huntington Bay Constable about 10:30 a.m., and the foundation coordinated with colleagues from Lloyd Harbor, Huntington Harbor and the Coast Guard. Bosworth urged anyone who sees a marine animal in distress to stay at least 50 yards away and to contact the foundation at to sightings@riverheadfoundation.org