Gallon of Milk is a rare albino whale. She belongs to a family of gray whales that travel off the Mexican Coast. Marine Biologists named the whale for her bright, white skin. Her last appearance was in 2009, according to Science Alert.
While she was a calf when scientists first spotted her, it appears that she now has a calf of her own, according to Science Alert. She can be seen with her calf, which appears normal in coloring, in the video below.
Marine biologists spotted her again during the seventh annual whale census which tracks the Gray Whale population in an effort to preserve the species, according to Tech Times.
While albinism is rare among most species, it is particularly rare among marine animals, according to Science Alert. Albino land animals are at a distinct disadvantage as their coloring makes them easy for predators to spot. Whales, may or may not have similar disadvantages.
Their rarity makes it difficult to research, however, her size (which could be up to 40 tons) may make her less of a target then smaller albino animals, according to Tech Times. According to Encyclopedia of Marine Mammals, typical disadvantages inherent in albino sea mammals include vision impairment and a reduced ability to absorb heat in cold water.
While these impairments can make it difficult for albino marine life, many live to reproduce, according to the Encyclopedia of Marine Mammals.
The National Commission of Natural Protected Areas said that 2,211 whales appeared during this year's census, including 1,004 calves born in Mexico. The Gray Whale population faces extinction in the western Pacific Ocean with only 130 whales present, according to Tech Times.