The Largest Stingray in the World Is as Long as a School Bus

The Largest Stingray in the World Is as Long as a School Bus
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Giant Freshwater Stingray
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The Giant Freshwater Stingray: Habitat
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The Giant Freshwater Stingray: Behavior
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The Giant Freshwater Stingray: Behavior (Cont.)
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The Giant Freshwater Stingray: Behavior (Cont.)
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IUCN Status
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IUCN Status (Cont.)
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About Stingrays
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Five Stingray Facts!
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10 Main Types of Stingrays
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Diet: Predators and Prey
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Diet: Predators and Prey
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The Largest Stingray in the World Is as Long as a School Bus
Giant Freshwater Stingray
The Giant Freshwater Stingray: Habitat
The Giant Freshwater Stingray: Behavior
The Giant Freshwater Stingray: Behavior (Cont.)
The Giant Freshwater Stingray: Behavior (Cont.)
IUCN Status
IUCN Status (Cont.)
About Stingrays
Five Stingray Facts!
10 Main Types of Stingrays
Diet: Predators and Prey
Diet: Predators and Prey

The Largest Stingray in the World Is as Long as a School Bus

Stingrays are a group of sea creatures that have captured the imagination of people for generations. Known for their flat disc-like body and long, whip-like tails, these fascinating creatures vary widely in size, coloration, and behavior, depending on the species. While some stingrays are relatively small, others can grow as large as a car or even a school bus! Of all the species, one stands out as the largest stingray in the world: the giant freshwater stingray. In this slideshow, we take a close look at this incredible animal, learning about its size, habitat, and behavior.

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Stingrays are a group of sea creatures that have captured the imagination of people for generations. Known for their flat disc-like body and long, whip-like tails, these fascinating creatures vary widely in size, coloration, and behavior, depending on the species. While some stingrays are relatively small, others can grow as large as a car or even a school bus! Of all the species, one stands out as the largest stingray in the world: the giant freshwater stingray. In this slideshow, we take a close look at this incredible animal, learning about its size, habitat, and behavior.

Giant Freshwater Stingray

The giant freshwater stingray is the largest stingray and one of the largest freshwater fish in the world. Some individuals grow as large as a school bus. These creatures typically inhabit rivers and estuaries in Southeast Asia. They have flat, diamond-shaped bodies, which can be 7 feet in length and 14 feet in width. The giant freshwater stingray also has a long, whip-like tail up to twice the length of its body. Their mouth is lined with serrated teeth.

The Giant Freshwater Stingray: Habitat

The giant freshwater stingray, also known as the freshwater whipray (Himantura chaophraya), is found in freshwater rivers and estuaries in Southeast Asia. Its habitat ranges from the delta of the Mekong River in Cambodia to the Chao Phraya River basin in Thailand and the Malay Peninsula. This massive stingray prefers deep pools in large, slow-moving rivers with sandy or muddy bottoms and dense vegetation. These environments provide good cover for the stingray to hunt and avoid predators.

The Giant Freshwater Stingray: Behavior

The giant freshwater stingray is a relatively solitary creature. It spends most of its time hidden in the depths of rivers or estuaries. They are nocturnal and prefer to hunt at night when predators are less likely to detect them. During the day, it often buries itself in sediment or rests in shallow areas.

This large stingray can produce strong electric fields to locate prey, navigate its environment, and communicate with other stingrays. It also has the ability to “taste” its environment using electroreceptors on its skin.

The Giant Freshwater Stingray: Behavior (Cont.)

As an ambush predator, the giant freshwater stingray preys on a variety of aquatic animals, including fish, crustaceans, and mollusks. It uses its long, whip-like tail to stun or immobilize prey, before crushing it with its powerful jaws.

During the breeding season, which occurs from December to February, this stingray migrates to estuaries to mate. The females give birth to live young, which remain in estuaries until they are large enough to join the adults in the deeper pools of the rivers.

The Giant Freshwater Stingray: Behavior (Cont.)

Overall, the giant freshwater stingray’s behavior is fascinating and unique, reflecting its adaptations to life in freshwater river systems. However, like many freshwater species, it suffers habitat destruction and overfishing. These could impact its behavior and ecology if not properly addressed.

IUCN Status

Although the giant freshwater stingray is a formidable predator, it is also threatened by overfishing and habitat destruction. It is a vulnerable species according to the International Union for Conservation of Nature (IUCN). Habitat destruction, pollution, and overfishing threaten their habitat. Agriculture, industrialization, and dam building upstream can also significantly impact the river systems the stingray inhabits. The degradation of its habitat is one of the main reasons the giant freshwater stingray is a vulnerable species.

IUCN Status (Cont.)

Despite the habitat threats, conservationists are making efforts to protect the giant freshwater stingray and its freshwater habitats. Conservation groups are working to better understand the species and its ecology. They also advocate for sustainable fishing practices and improved management of river systems. The giant freshwater stingray is an important part of the aquatic ecosystem and is well worth studying and protecting.

About Stingrays

Stingrays are fish able to glide gracefully through the water. There are about 200 different species in the oceans around the world. They also live in lakes and freshwater rivers. Categorized as a group of sea rays, they are related to sharks.

They consist of eight families of fish: Plesiobatidae, Urotrygonidae, Hexatrygonidae, Urolophidae, Potamotrygonidae, Dasyatidae, Myliobatidae, and Gymnuridae. However, stingrays all around the world face threats to survival. Rather than bones, their bodies consist of cartilage.

These fish also have camouflaging capabilities that allow them to escape their predators.

They are known to hit predators with their tails upon sensing danger, which is particularly effective as a result of a barb on their tail.

Five Stingray Facts!

  • Related to sharks: As part of a group of fish called batoids, stingrays aren’t that different from sharks. Though there are clear differences in size, shape, and anatomy, both animals have cartilage (rather than bone). This similarity has given them the nickname “flat sharks.”
  • Flat-bodied: Stingrays are fish that have flat bodies that help them camouflage and blend with their surroundings and eventually escape their predators. They also sting their predators with the spines or barbs in their tails.
  • Completely boneless: These fish have no bones in their bodies.
  • Hundreds of stingrays: There are about 200 different species, including the ocellate river – the thorntail – and the flower stingray.
  • All alone: These fish are solitary creatures and come together only for breeding or migration.

10 Main Types of Stingrays

There are 10 main types of stingrays:

  • Ocellated river stingray
  • Sixgill stingray
  • Whiptail stingrays
  • Potamotrygonida
  • Yellow Stingray
  • Round Stingray
  • Butterfly ray
  • Urotrygonidae
  • Round stingrays
  • Spiny butterfly ray

Diet: Predators and Prey

Group of Grey Seals peeking out from the water and curiously look the visitors

The main predators of these fish include sharks and seals. Other large fish also feed on them since the larger predators in the ocean will go after almost anything smaller than them.

However, their flat body and smooth movements allow them to lie against the floor of their natural habitat to hide. Rather than attacking when threatened, most will simply flee as quickly as they can. For the most part, the primary prey that they go after is fish that are smaller in size than them.

Diet: Predators and Prey

Caprellid Amphipod

They usually eat clams, oystersshrimp, and other small fish that are found in shallow waters, though they have been known to eat snails and squids.

For the most part, stingrays are not aggressive and are not very high up on the food chain. However, humans will fish for them to capture as a healthy source of protein.

Author photo

Written by Jennifer Gaeng

Published: February 21, 2025

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