Humongous Humpback Whale Facts

Humpback whales are among the most impressive creatures in the ocean. These enormous marine mammals are known for their incredible size, unique feeding techniques, long migrations, and unforgettable presence in coastal waters.

From their powerful bodies to their complex behaviors, humpback whales continue to amaze scientists and ocean lovers around the world.

1. Humpback Whales Are Enormous Animals

The humpback whale (Megaptera novaeangliae) ranks as the fifth largest species among the great whales. Fully grown adults can reach lengths of around 60 feet and weigh as much as 80,000 pounds. Like many baleen whale species, females are generally larger than males. The largest recorded humpback whale was a female estimated to have measured about 89 feet long and weighed close to 200,000 pounds.

Humpback whales are sometimes called the “big-winged New Englander” because of their unusually large pectoral fins. These long flippers can reach up to 15 feet in length, making them one of the whale’s most recognizable features. Their pectoral fins can measure nearly one-third of their total body length and are even flexible enough to help them move backward through the water.

Baby humpback whales are also surprisingly large when they are born. A newborn calf can weigh around 2,000 pounds and measure approximately 20 feet long, which is about the same length as its mother’s head.

Many humpback whales seen around the San Juan Islands are adult females traveling with calves or younger males and females. One famous whale known as “Big Mama” has returned to the Salish Sea with another calf, marking her sixth documented offspring.

2. Humpback Whales Have Huge Appetites

Humpback whale calves are born weighing nearly 2,000 pounds and need a tremendous amount of nutrition to grow. During their first months of life, they depend entirely on their mother’s milk, which contains around 50% fat. A young calf can drink as much as 600 liters of milk each day to develop a thick layer of protective blubber.

After about five to seven months, calves begin adding small fish and krill to their diet. By around ten months old, they are usually fully weaned.

Adult humpback whales use several impressive hunting techniques, including bubble-net feeding and tail-slapping methods, to capture food such as krill, plankton, and small fish.

Many humpbacks found in the Salish Sea use a method called lunge feeding. During this process, the whale charges forward and swallows large groups of small schooling fish, often herring. The whale then forces seawater out through its baleen plates, leaving the trapped fish behind to eat. The mouth of a humpback whale is enormous—large enough to compare with the size of a Volkswagen Beetle.

Adult humpback whales typically feed heavily during the summer months in Arctic waters. Before beginning their long migration to warmer winter areas, they may consume up to 3,000 pounds of food each day to build energy reserves.

3. Humpback Whales Have Hair-Like Features

Although whales appear completely smooth from a distance, humpback whales actually have two interesting hair-related structures: baleen and tubercles.

Baleen is a hair-like filtering material found inside the whale’s mouth. Similar to human hair and fingernails, baleen is made from keratin. These plates hang in rows along the upper jaw and act like a natural filter system.

When a humpback whale takes in a large amount of seawater, it pushes the water back out through the baleen. The tiny bristles trap food items such as krill, small fish, and other small marine organisms, allowing the whale to swallow its meal.

Another unusual feature is the presence of tubercles. These fist-sized bumps are located along the whale’s snout, or rostrum. Each tubercle contains a hair follicle connected to a complex network of nerves.

Scientists are still studying the exact purpose of these sensory structures, but researchers believe they may help humpback whales:

Detect changes in water temperature

Sense nearby prey

Improve movement efficiency

Increase swimming control and agility

Future research will reveal more about these unique adaptations.

4. Humpback Whales Travel Incredible Distances

Humpback whales that are commonly seen around the Puget Sound and surrounding areas belong mainly to the Eastern North Pacific population.

During autumn, these whales leave feeding areas in Alaska and begin a remarkable journey to warmer winter habitats in places such as Hawaii and Mexico. Their migration can last up to eight weeks and cover distances of nearly 6,000 miles round trip.

This enormous seasonal journey is among the longest migrations made by any mammal on Earth.

In 2010, a female humpback whale completed an extraordinary trip from the coast of Brazil to Madagascar in eastern Africa. The approximately 6,200-mile journey set a new record for humpback whale migration distance.

5. Humpback Whales Have Returned to the San Juan Islands

For much of the 1980s and 1990s, humpback whale sightings in the Salish Sea were uncommon.

That began to change in 2003, when humpback whales started returning regularly to the waters around San Juan Island. Since then, sightings have increased throughout areas including British Columbia, Washington State, the San Juan Islands, Georgia Strait, the Strait of Juan de Fuca, and Haro Strait.

In 2015, researchers recorded around 50 individual humpback whales in the Salish Sea.

As populations continue to recover and more whales return each year, the San Juan Islands have become an increasingly exciting place to observe these magnificent ocean giants. Each season brings the possibility of meeting new visitors and learning more about these remarkable animals.