Officials still have not determined what caused an oil slick in Sandy Hook Bay.

A Coast Guard crew confirmed a 2-mile-long, 300-foot-wide light sheen on the water on Thursday afternoon.

A boom was deployed to shield Horse Shoe Cove.

State and federal responders were unable to relocate the sheen on Thursday evening.

Officials are concerned that the spill could impact wildlife that inhabit the bay, including seals that migrate to the area each winter.

Gregg Sarra sounds off on Wantagh vs. Bethpage and Ward Melville vs Sachem North, plus Michaeil Sicoli has his Nassau soccer picks, an update on the high school fantasy football standings and the plays of the week. Credit: Newsday/John Paraskevas; Anthony Santino

Sarra Sounds Off, Season 3, Ep 5: Top football teams in action and Nassau soccer playoff picks Gregg Sarra sounds off on Wantagh vs. Bethpage and Ward Melville vs Sachem North, plus Michaeil Sicoli has his Nassau soccer picks, an update on the high school fantasy football standings and the plays of the week.

Gregg Sarra sounds off on Wantagh vs. Bethpage and Ward Melville vs Sachem North, plus Michaeil Sicoli has his Nassau soccer picks, an update on the high school fantasy football standings and the plays of the week. Credit: Newsday/John Paraskevas; Anthony Santino

Sarra Sounds Off, Season 3, Ep 5: Top football teams in action and Nassau soccer playoff picks Gregg Sarra sounds off on Wantagh vs. Bethpage and Ward Melville vs Sachem North, plus Michaeil Sicoli has his Nassau soccer picks, an update on the high school fantasy football standings and the plays of the week.

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