This substance aids in holding oxygen and delivers it to whatever part of the body that needs it most. Now they also have an oxygen holding substance in their muscle tissue called myoglobin. In fact whale muscle tissue is a deep red, almost purple color because it holds such an amazing amount of oxygen. Now the Humpback can grow to be about 52 feet and weigh between 30 to 50 tons. They also have two blow holes.
Humpbacks come in four different colors, ranging from white to black to mottled.
They also have distinctive patches of white on the underside of their tails. These markings are unique to each whale kind of like our finger prints. The humpback also has 14 to 35 throat grooves that run from the chin to the navel. These grooves allow their throat to expand during the huge intake of water during feeding. Also humpbacks have huge, mottled white flippers with rough edges that are up to one third of its body length.