Those paws

Glowing is something that the Polynesians used as a navigational aid to search for islands in the Pacific Ocean.

A term from Polynesian folklore denoting an unexplained and scientifically unproven light phenomenon under or on the surface of the ocean.

Te lapa loosely translates as "flashing light", "underwater lightning", "flashing", or "that which flashes". 

Historical and modern Polynesians used it as a navigational aid to search for islands in the Pacific Ocean.

The te-paw is used for navigation at a distance of no more than 120 miles from the shore and rarely at a distance of less than 2 miles from the shore, since the island is already visible from such a distance, but it is best seen at a distance of 80 to 100 miles from the shore.

It is usually white in color, although its color may depend on the composition of the water. It has also been described as having the shape of a straight line. Researcher David Lewis, who also saw the lights, described them as "streaks", "flickering", "flashes", "darts", "arrows" or "glowing plaques", but never jagged like lightning. Those paws will move slower as they move away from the sea and faster as they approach the shore, often having a "character of rapid jerks back and forth."

In some cases, it has been assumed that it has a bioluminescent or electromagnetic nature. Other hypotheses include interference patterns of intersecting waves, creating an elevated curve acting as a lens, but not explaining the light source.