Whales are some of the most amazing creatures on Earth. Even though they live in the ocean, they are not fish.
Whales are 100% mammals, just like humans, dogs, and cows. This means they breathe air through lungs, are warm-blooded, and give birth to live babies.
Because they are mammals, whale mothers must also produce milk to feed their babies (called calves). Whale milk is a wonderful biological adaptation that allows these calves to survive the sea.
Thick as Toothpaste
Whale milk looks entirely different compared to regular cow milk, which is just a thin liquid. It is extremely thick, with a texture often compared to toothpaste, soft butter, or yogurt.
The reason for this thickness is its incredibly high fat content. Human or cow milk usually only has about 4% fat. However, whale milk can contain between 30% and 50% fat.
This high fat is a crucial tool for survival. Since whales nurse underwater, regular liquid milk would simply dissolve and disappear into the salty seawater before the baby could swallow it.
Thanks to its thick texture, the milk stays together in a clump, allowing it to travel from the mother to the calf without being wasted in the ocean.
How Whale Babies Eat Underwater
Feeding a baby in the water is tricky because whales do not have lips to suckle like land mammals. Whale mothers keep their nipples hidden away inside special folds of skin called mammary slits. This keeps them hydrodynamic, allowing them to glide smoothly through the water without any extra drag slowing them down.
When a calf is ready to eat, it nudges the mother's belly, and the nipples pop out. Instead of the baby sucking the milk out, the mother actually uses special muscles to pump or squirt the milk directly into the baby's mouth.
Some scientists believe the calves might also curl their tongues into a straw-like shape to help catch the milk as it is released.
The Massive Growth of Calves
Whale babies need to grow very fast to build a thick layer of blubber to stay warm in cold water. Because whale milk is so rich in fat and protein, calves gain weight so fast.
For example, a blue whale calf can drink between 50 and 150 gallons of milk every single day. By drinking this heavy cream, a blue whale calf can gain about 90 to 100 kilograms every 24 hours.
That means the baby grows as much as a full-grown human man's weight in just one day. These calves usually stay with their mothers for several months or even years, depending on the species, before they are ready to eat solid food like krill or fish.
What Does Whale Milk Taste Like?
If you wonder, what does whale milk taste like, scientists describe it as having a very strong, oceanic flavor and a distinct fishy smell. The taste resembles a combination of fish, liver, castor oil, and even milk of magnesia.
This intense flavor comes from its high fat content, which can reach up to 50%, making just a half-cup serving pack around 900 calories.
