*Top 16* Amazing Whale Shark Facts
With a name like “Whale Shark”, its hard to know if they are a whale or a shark. The answer? Whale Sharks are SHARKS! Which means that they are a fish. (Cold blooded, breathe through gills, etc).
In fact, with a weight of 20 tons, Whale Sharks are the largest fish in the ocean.
They are easily recognizable by their square head and enormously wide mouth. Filter feeders, they eat 3,300 pounds a day of tiny prey such as plankton, krill, jellyfish, and crab larvae.
Only 4 aquariums in the world feature Whale Sharks – 3 in Japan and the Georgia Aquarium in Atlanta.
Read on to learn more Amazing Whale Shark Facts!
Want to see Whale Sharks in person? Check out my Georgia Aquarium blog to learn more!
1) Whale Sharks are Sharks – not Whales
Despite their name, Whale Sharks are not whales – they are fish. They are cold blooded, breathe through gills instead of lungs, and have skeletons made out of cartilage rather than bone.
Unlike whales and dolphins, they do not need to surface for air and do not nurse their young. Their name comes from their enormous size and slow, whale-like swimming behavior.
2) Whale Sharks are the Largest Fish in the Sea
Weighing over 20 tons, Whale Sharks are the largest fish in the sea. Some grow to over 40 feet, which is longer than a school bus!
Whale Sharks are easily recognizable by their broad, square head which is a completely different shape than other sharks. And for their extremely wide mouth, which grows up to 3 feet across.
Want to learn about Sharks? Check out my Top Amazing Shark Facts blog!
3) Whale Sharks Have Over 3,000 Teeth
Incredibly, Whale Sharks have over 3,000 teeth! Located in 300 rows!, they are less than one inch long. Unlike most sharks, their teeth are small and mostly useless for eating. They don’t bite or chew their food. Scientists believe these teeth are evolutionary leftovers from predatory ancestors.
4) Whale Sharks are Filter Feeders
Despite their huge size, Whale Sharks eat tiny prey such as plankton, krill, jellyfish, and crab larvae. Amazingly, they eat up to 3,300 pounds a day!
Whale Sharks are filter feeders. They swim near the water’s surface and swallow up to 1,500 gallons an hour. They swallow whatever prey they catch and expel water through their gills. (Note that this is different than the process used by Baleen Whales).
5) Whale Sharks Have 5-Foot Wide Mouths
A fully grown Whale Shark can open its mouth nearly 5 feet wide, making it one of the largest mouths in the animal kingdom. Unlike most sharks, their mouth sits at the very front of their head rather than underneath.
Their enormous mouths allow them to swim with open jaws, collecting massive water volumes and food efficiently as they glide through plankton-rich waters.
Want to learn about Hammerhead Sharks? Check out my Top Amazing Hammerhead Shark Facts blog!
6) Each Whale Shark’s Spot Pattern is Unique
Whale Sharks have a grayish-blue body covered in white spots and stripes.
Every Whale Shark has a one-of-a-kind spot pattern, making them as unique as fingerprints! The spot patterns on whale Sharks can change over time, with new spots appearing and old ones fading.
7) Whale Sharks Can Give Birth to Over 300 Pups
Whale Sharks reproduce through a rare method called ovoviviparity, where eggs hatch inside the mother’s body before live pups are born.
Newborns are ready to swim and feed themselves immediately, showing no parental care, which is common among sharks.
8) Whale Sharks Are Slow Swimmers
Whale Sharks swim only 3 miles per hour, but cover thousands of miles annually, conserving energy while feeding.
Despite cruising slowly, they are long-distance migrators. They move across oceans to follow feeding opportunities and warm water currents.
9) Whale Sharks Can Live 70-100 Years
Whale Sharks are one of the longest-living Sharks. Their longer lifespan allows them to travel thousands of miles over decades following plankton blooms.
They age slowly and mature late, possibly not reaching reproductive age until around 25–30 years old. This slow life cycle makes their populations especially vulnerable to environmental threats.
10) Whale Sharks Prefer Warm Waters
Whale Sharks are typically found in tropical and warm temperate oceans around the world. They prefer water temperatures above 70°F and often gather seasonally where plankton blooms occur. Popular sightings happen near Mexico, the Philippines, Australia, and parts of the Indian Ocean, where food becomes abundant.
11) Whale Sharks Grow Very Slowly
Whale Sharks grow gradually over decades rather than years. Young Sharks may only grow a few inches annually during early life stages. Because they mature slowly and reproduce later in life, population recovery takes a long time if numbers decline.
Want to learn about Great White Sharks? Check out my Top Amazing Great White Shark Facts blog!
12) Whale Sharks are Gentle Giants
Despite their enormous size, Whale Sharks are docile and completely harmless to humans. They show no aggressive behavior and often tolerate swimmers and divers nearby. This makes them a favorite of marine eco-tourism programs worldwide. Their feeding habits focus entirely on microscopic prey, earning them the nickname “gentle giants of the sea.”
13) Whale Sharks have Retractable Eyes made out of “teeth”
Whale Sharks possess a rare defensive feature among sharks – retractable eyes. When threatened or bumped, they can pull their eyes slightly back into their sockets for protection. Their eyes are also covered with tiny tooth-like scales called dermal denticles, adding another layer of defense against injury.
14) Whale Sharks have a Solitary Lifestyle
Unlike many other species of fish, Whale Sharks prefer to live alone. However, groups are seen seasonally at feeding sites such as plankton blooms.
So how do they reproduce? Very little is known.
15) Male Whale Sharks are Smaller than the Females
Like many shark species, female Whale Sharks grow larger than males. Scientists believe the larger size helps females carry large numbers of developing embryos. Males usually reach shorter lengths and slimmer body shapes compared to the heavier, broader females.
16) Whale Sharks are Endangered
Whale Sharks are currently listed as Endangered due to overfishing, accidental capture in fishing gear, ship strikes, and habitat disruption. Because they grow slowly and reproduce late, population recovery happens very slowly.
Final Thoughts
Whale Sharks are proof that the ocean’s biggest creatures are not always the most dangerous. They quietly filter plankton as they travel thousands of miles through warm oceans.
Their peaceful nature, slow growth, and vulnerable status remind us how important ocean conservation has become. Protecting Whale Sharks helps protect entire marine ecosystems that depend on balance and biodiversity.
