A winter sunrise at the mouth of the Taunton River, where it empties into Taunton Bay near Mount Desert Island. Silhouetted against the sea smoke is one of the many eagles that nests and hunts in Hancock County. Photo courtesy of Susan Cole Kelly

Joe Carter of Arundel shoots video of sea smoke rising in Cape Porpoise.

A view of the Portland Head Light and fishing shacks from Willard Beach at sunrise. Photo courtesy of Moe Chen

A woman photographs sea smoke rising from the harbor in Portland, on a day when the temperature at dawn was minus 8 degrees.

Sunrise on the Spring Point Ledge Light and sea smoke on Casco Bay in South Portland. Photo courtesy of Moe Chen

A rising sun colors sea smoke rising around lobster boats in Cape Porpoise harbor.

The Pier at Old Orchard is surrounded by ocean mist as frigid air moves over the relatively warmer water. It was about minus 7 degrees when this photo was taken. Photo courtesy of Benjamin Williamson

A fisherman works aboard a trawler passing House Island in Casco Bay off Portland, where the temperature at dawn was minus 8 degrees. Sea smoke is a fog formed by extremely cold air moving across warmer water.

The temperature when this shot was taken near Portland Head Light was minus 9 degrees. Photo courtesy of Benjamin Williamson

Temperatures in Portland reached as low as 8 below zero on this winter morning.

Sea smoke rises amid several lobster boats in the small fishing village of Five Islands. Photo courtesy of Benjamin Williamson

Passengers brave a subzero temperatures to ride on an outdoor deck of a ferry making its way through arctic sea smoke off Portland.

Smoke on the water, sea smoke, that is, and photographer Benjamin Williamson climbed onto the old battlements at Fort Preble to capture this dramatic image of Portland Head Light on a subzero morning when the lighthouse looked like a rocket launching through the water vapor.

No, this isn’t a charcoal painting or a black and white photo. Scott G. McMullin of Scarborough captured this image of Plummers Island, with sea smoke rising from the Nonesuch River and Scarborough Marsh.

A man shields his eyes from the sun as he views the sea smoke rising from Casco Bay.

Sea smoke rises from the Fore River in Portland as morning traffic moves along Interstate 295.

Drivers head into the Portland area over Tukey's Bridge as sea smoke rises from the Back Cove. Gordon Chibroski/Staff Photographer

Sea smoke forms off the shore of Cushing Island.

Joanne Arnold walks the rocks leading to the Spring Point Ledge Lighthouse in South Portland while "sea smoke" rises in the background. The smoke is formed by cold air hitting the warmer layer of air above the ocean.

The rising sun colors sea smoke rising behind Goat Island Lighthouse and frozen mud flats in Cape Porpoise harbor .