How well can humpback whales see?
Humpback whales can see well beneath and above the water since the colors change under water. Their brown eyes are perfectly adapted: lachrymal glands produce a fatfilm which protects the eye from saltwater. The lens is elastic and can be adjusted to the different light conditions by muscle power. Humpback whales can see up to 400 feet under clear water. They can also see equally well above the surface. According to research, cetaceans also have a tapetum, giving the eye the ability to reflect light back through the retina increasing the light available. This is especially important in low light conditions, but also important in water where things appear more blurry.
