ligne décoration
  • ID number


  • Sex


  • Year of birth

    Before 1980

  • Known Since


Distinctive Traits

DL0743 can be recognized by its small scar under the dorsal crest on the left side. A little in front of it, we see a small grey spot, more or less visible depending on the light. There are also some minor nicks in his dorsal crest.

Life History

The first encounter with DL0743 goes back to 1992. At the time, he was already white. Belugas fade from gray to white in colour between the ages of 12 and 16. DL0743 would therefore have been born before 1980.

His large size, habits and associations strongly suggest that he is a male. Like other adult bulls of the population, in summers DL0743 spends most of his time in herds composed essentially of males. He is affiliated with one of the two networks of males that ply the waters of the Saguenay Fjord. Another network of males, known as the “Downstream Boys”, also uses the head of the Laurentian Channel sector and the downriver portion of the Estuary, but avoids the Saguenay. Even if their territories overlap, individuals from one network seldom come into contact with males of other networks.

As the years pass by, males have a tendency to form stable groups of companions. These associations are established gradually and may play a role in belugas’ reproductive lives. DL0743’s regular companions are Brad and Vita, who are also members of one of the Saguenay networks.

How DL0743’s story and those of his companions unfold will teach us volumes on the evolution of belugas’ social lives. By better understanding how belugas live, we will be able to better protect them.

Regularly seen with

Observations history in the Estuary


Years in which the animal was not observed Years in which the animal was observed

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Latest News

Right from the start of the work day, we encounter a herd of 100 to 120 individuals not far from Île Rouge. On the surface, we can see krill. Although the latter are not part of the beluga’s diet, they may be prey for their prey. In any case, there’s action in the tide rip! Seabirds are feeding and diving all around us. A minke whale is also manoeuvring amongst all of this wildlife. It even performs a technique known as “leap frogging”.

Our focus is on the belugas, even if the presence of a fin whale offshore is always a pleasant distraction. We approach small clusters of about five individuals to photograph them. We recognize DL0014, Or Blanc and DL0743. In another group, we see DL0240 and DL9056. With their repeated diving and surfacing, it seems the belugas are feeding. A gull just misses stealing a fish right out of a beluga’s mouth! Not far from us, a humpback dives. We’re so lucky to be studying whales!

We sail in the mouth of the Saguenay River, near rivière aux Canards in Baie-Sainte-Catherine when we see the female Bonheur in a herd of about 50 individuals, white adults and grey young. We also recognize DL0743, a male from the Saguenay region.

Animals are very active. They start diving and ascending to the same place several times, a behaviour called “miling” that is often associated with feeding. The mouth of the Saguenay is a meeting place! Networks of beluga males cross paths with herds of females and young. Gatherings were formed there, but only for a short time, due to the abundance of food.


We’re off the coast of Les Escoumins. DL0743 is swimming in a herd of about 150 belugas, all white adults. Such large gatherings are observed frequently in the downstream sector of the belugas’ summer range. They are generally short-lived and composed essentially of bulls.

Upon our arrival, the belugas are clustered in groups of four or five individuals each. We quickly manage to identify ten or so belugas, including Vita, DL0014 and Frimas. As the herd splinters into smaller groups, our work becomes increasingly difficult. The day draws to a close, and we head home…


  • Cynthia Beaulieu
  • Ms Marjorie class (Jean XXIII)
  • Clélia Gauduchon
  • Manon Lapointe
  • Nathalie Lucas «Thank you very much for the work you do, these animals are a public good, and they must not disappear from our world!»
  • Patricia Lyonnet «My biggest dream is to see beluga whales! It is an honour for me to help you each month to protect them and care for them!»
  • Roxane Monsion «I suggest the name Jeannot as my grandpa who I miss very much.»
  • Maude Roy
  • Marie-Eve Landry «We suggest the name “Jack”, since we are donating to celebrate his birthday.»
  • Odile Jalbert