- Hvítfiskur
- Qilalugaq qaqortaq
- Mjaldur
- Hvithval
- Vilgesguolli
- Hvidhval
Beluga whales are an Arctic species and the only cetacean species that naturally occur in white colour. Their name comes from Russian word “belukha” which means white, from their distinguishable colour. Beluga whales, are however, not born white. Calves are born grey and lighten in colour in the next 14-18 years when they become pure white. They are nicknamed the “sea canary” for their wide variety of trills, clicks, squeaks, and whistles that can be heard even above the surface.
Beluga whales are unique among cetaceans due to their seven neck vertebrae that are not fused together, enabling them to move their heads up, down, and side-to-side. This flexibility helps them in navigating icy waters, locating prey, and more effectively directing their echolocation signals, used for communication and hunting. They can also alter the shape of their melon—a fatty organ used for echolocation and communication—by controlling facial muscles and blowing air around its sinuses.
Beluga whales live in the cold Arctic waters, wintering in polynyas and leads among the pack ice, and moving closer to shallow bays and estuaries of the large northern rivers during summer. Because of their winter icy environment, beluga pods can occasionally find themselves entrapped in the sea ice. This happens when ice forms around the pod, trapping them in small pool they are unable to leave form. While entrapments are a form of natural mortality for belugas, their occurrences my increase due to different human activities or as a consequence of changes in movement of sea ice due to climate changes.
The situation of beluga in the Faroe Islands
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The situation of beluga in Greenland
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The situation of beluga in Iceland
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The situation of beluga in Norway
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The situation of beluga in Denmark
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Sound credit: Outi Tervo, Greenland Instute of Natural Resources
Main threats
Research
What is the role of beluga whales in the Arctic ecosystem? How would changes in the beluga whale populations affect their environment?
Most cetaceans, including dolphins and whales, have fused neck vertebrae, limiting their ability to move their heads independently of their bodies. Beluga whales, however, have a more flexible neck that consists of seven non-fused neck vertebrae. This adaptation allows them to rotate their heads, giving them a greater range of motion.
This ability to turn their heads gives them advantage in the Arctic and subarctic regions. It may help them navigate through icy waters, search for prey, and interact with their surroundings more effectively. It can also help them to better direct their echolocation signals, which they use for communication, navigation, and locating prey in the water.
This flexible neck is one of the things that make beluga whales unique and different from other marine mammals.
Narluga is a hybrid between narwhal and beluga. It was caught by an Inuit hunter in the late 1980s. The hunter had never seen such an animal before, with uniformly grey skin, flippers resembling those of belugas, and a tail fluke that looked like it belonged to a narwhal. Due to its uniqueness, the hunter decided to keep the skull.
While the skull displayed characteristics of both species, the most significant difference lay in the teeth. This animal had 18 distinctly shaped teeth, unlike narwhals and belugas. Due to the outwardly-extending shape of the teeth, scientists presumed that this animal was a bottom-feeder, using its teeth as shovels to root through sand. By unravelling the DNA, Skovrind and his team revealed that the animal was a male, a first-generation hybrid from a narwhal mother and a beluga father, and was therefore baptized as a narluga.
This isn't the only instance of closely related animals mating and producing offspring. Narwhals and belugas are the only living members of their family and are often observed together, raising the possibility of more narlugas inhabiting the polar waters, yet to be discovered.
If you would like to read about first description of the animal read the paper by Heide-Jørgensen and Reeves (1993), and to read genomics analysis read the paper by Skovrind et al. (2019).
Interestingly, yawning in aquatic species, like belugas, is intriguing because they don't breathe through their mouths, as fully aquatic mammals have a separate trachea and esophagus. Nevertheless, the open mouth behaviour displayed by beluga whales during certain events has been described as "yawn-like" due to its resemblance to yawning in terrestrial mammals. But why do belugas yawn, and what triggers this behaviour? The function of yawning in animals, including belugas, remains somewhat mysterious. In humans, yawning has been associated with various factors such as sleepiness, respiration and circulatory needs, boredom, arousal, empathy, and thermoregulation. The observation of Ames (2022) raises questions about whether belugas, with their social and imitative abilities, may have the capacity to imitate human motor movements. Read the full observation by Ames (2022) here: https://doi.org/10.1578/AM.48.6.2022.495The melon is a rounded, fatty organ located at the front of a toothed whale's head. They use this organ to help with echolocation—navigating and hunting by sending out sound waves and interpreting the echoes that bounce back, like the sonar on ships. Not only that, but from anecdotal observations, scientist learnt that beluga whales can change their facial expressions, possibly by changing the shape of the melon. To research this phenomenon, Justin Richard and colleagues did a study on four belugas at Mystic Aquarium in Connecticut (USA). Over a one-year period, they collected 208 hours of footage, documenting 2,570 instances of melon shape changes during various interactions, both in social and non-social contexts. They identified five different melon shapes: flat, lift, press, push, and shake. Four of those shapes require the facial muscles to be actively engaged, while "shake" occurs with relaxed muscles.
Males changed their melon shapes over three times more often than females. Different shapes were used in various contexts: "press" was common in courtship and male-male sociosexual play, "push" was rare in courtship, and "shake" was more frequent in courtship than in other types of social interactions. These changes are a form of visual communication, controlled by facial muscles, and sometimes accompanied by the whales opening their mouths. This study shows that the melon plays a role in active communication in addition to its role in echolocation.
If you are as fascinated by this study by Richard, Pellegrini, and Levine as we are, give it a read here:
Interestingly, yawning in aquatic species, like belugas, is intriguing because they don't breathe through their mouths, as fully aquatic mammals have a separate trachea and esophagus. Nevertheless, the open mouth behaviour displayed by beluga whales during certain events has been described as "yawn-like" due to its resemblance to yawning in terrestrial mammals. But why do belugas yawn, and what triggers this behaviour? The function of yawning in animals, including belugas, remains somewhat mysterious. In humans, yawning has been associated with various factors such as sleepiness, respiration and circulatory needs, boredom, arousal, empathy, and thermoregulation. The observation of Ames (2022) raises questions about whether belugas, with their social and imitative abilities, may have the capacity to imitate human motor movements. Read the full observation by Ames (2022) here: https://doi.org/10.1578/AM.48.6.2022.495The relationship between animals and music has always been an interesting topic of research. The studies on how different animals react to different types of music have provided us with some fascinating information. For example, both dogs and cows who were exposed to classical music showed signs of reduced stress. The cows even produced up to 3% more milk!
Even marine mammals have a long history with music. One of the most famous stories is “Operation Beluga”. In December 1984, a pod of beluga whales got trapped in fast ice (sea ice that is "fastened" to the coastline, to the seafloor, or to grounded icebergs) off the coast of the Chukchi peninsula. The locals kept the belugas alive for over a month by feeding them and keeping the ice open so that the animals could surface and breathe.
Rescue came in the form of the Russian icebreaker “Moskva”. They first started breaking the ice to create a path from the trapped belugas to open water. However, the animals were scared and exhausted, and were staying away from the icebreaker. To get the whales to follow the big scary ship, one of the crew members recalled hearing that whales could react to music. So, they started playing different genres of music, but classical music provoked their interest the most. The pod started following the ship back to the open water. In an expensive operation that lasted several weeks, the ship and its crew were able to save around 2,000 belugas.
Interestingly, yawning in aquatic species, like belugas, is intriguing because they don't breathe through their mouths, as fully aquatic mammals have a separate trachea and esophagus. Nevertheless, the open mouth behaviour displayed by beluga whales during certain events has been described as "yawn-like" due to its resemblance to yawning in terrestrial mammals. But why do belugas yawn, and what triggers this behaviour? The function of yawning in animals, including belugas, remains somewhat mysterious. In humans, yawning has been associated with various factors such as sleepiness, respiration and circulatory needs, boredom, arousal, empathy, and thermoregulation. The observation of Ames (2022) raises questions about whether belugas, with their social and imitative abilities, may have the capacity to imitate human motor movements. Read the full observation by Ames (2022) here: https://doi.org/10.1578/AM.48.6.2022.495






















































































































