Whales of the Saint-Laurent: 13 species you can see
3-Hour Whale Watching Boat Tour
Duration: 3 hours
How many whale species can you see near Tadoussac?
Up to 13 cetacean species have been documented in the Saint-Laurent estuary near Tadoussac, including 5 baleen whale species, 2 toothed whale species, and 6 dolphin and porpoise species. The most commonly seen on tours are minke whale, fin whale, humpback whale, and beluga (from shore). Blue whales are less frequent but present July–September.
The Saint-Laurent: one of the world’s richest cetacean habitats
The Saint-Laurent estuary near Tadoussac is not a whale watching destination by coincidence or marketing. It is one of the most productive marine mammal habitats in the northern hemisphere, sustained by the nutrient upwelling at the Saguenay confluence and the extraordinary biodiversity of the estuary ecosystem.
The Group for Research and Education on Marine Mammals (GREMM), the Québec-based research organisation that monitors cetacean populations in the Saint-Laurent, has documented 13 cetacean species in the area over decades of systematic observation. This guide profiles each species: what they look like, how to identify them on a tour, their typical behaviour at the surface, when they appear in the season, and their conservation status.
The five baleen whale species
Baleen whales (mysticeti) have no teeth. Instead, they have plates of baleen (keratin bristles) hanging from the upper jaw that filter large volumes of water, trapping krill, copepods, and small fish. They are the giants of the cetacean world and the primary target of whale watching tours.
1. Blue whale (Balaenoptera musculus)
Status in Saint-Laurent: seasonal visitor, summer Size: up to 30 metres, 150–170 tonnes Conservation status: endangered
The largest animal that has ever existed on Earth. Full stop. Nothing in the fossil record or the modern ocean comes close to the mass of a large blue whale.
In the Saint-Laurent, blue whales arrive from their winter breeding grounds in the Gulf of Mexico and Caribbean in late June or July and remain until September, feeding on krill in the nutrient-rich estuary waters.
How to identify at sea:
- Sheer size — when a blue whale surfaces near a boat, nothing else looks like that
- Blue-grey mottled colouring, sometimes appearing lighter in shallow water
- Small dorsal fin set extremely far back on the body (about 3/4 of the way to the tail)
- Exceptionally long back — as the whale surfaces to breathe, its back rolls and rolls through the surface for what seems like an impossibly long time before the fluke appears
- Blow (spout): the tallest and most powerful of any whale — up to 9 metres high, wide column
- Flukes: broad and triangular, often not raised above the surface during a typical dive
Typical behaviour: Blue whales in the Saint-Laurent are primarily feeding animals. Surface activity is limited compared to humpbacks — they breathe (typically 2–6 blows before a deeper dive), roll slowly at the surface, and then submerge for 5–20 minutes. Breaching is very rare (too large for the energy expenditure to make sense). The power of the animal is in its scale, not its acrobatics.
Viewing note: approach distance under Canadian Marine Mammal Regulations is 200 metres minimum for blue whales. Even at 200 metres, the scale is extraordinary.
2. Fin whale (Balaenoptera physalus)
Status in Saint-Laurent: seasonal visitor, summer and fall Size: up to 26 metres, 70–80 tonnes Conservation status: vulnerable
The second-largest animal on Earth and arguably the most commonly seen large whale on Tadoussac tours. Fin whales are fast (nicknamed “the greyhound of the sea,” they can sustain 25–30 km/h), sleek, and distinctive once you know what to look for.
How to identify at sea:
- The most distinctive feature: asymmetric jaw colouring. The right side of the lower jaw is white; the left side is dark. This unique colouring (the only asymmetric pigmentation pattern in the animal kingdom) is visible when the whale surfaces and turns.
- Large size — substantially bigger than a minke but slightly smaller than a blue whale
- Blow: tall, narrow column, visible from kilometres away on calm days
- Dorsal fin: more curved than a blue whale’s, set somewhat further back than a minke’s
Typical behaviour: Fin whales are fast and directional swimmers. They often surface in a consistent pattern — blow, blow, blow, then a deeper dive — before reappearing 10–15 minutes later. They sometimes feed cooperatively in groups (particularly on capelin) and can be seen rolling on their side at the surface while lunge-feeding. Like blue whales, they rarely breach.
3. Humpback whale (Megaptera novaeangliae)
Status in Saint-Laurent: seasonal visitor, summer Size: up to 16 metres, 30–40 tonnes Conservation status: least concern (recovered substantially from whaling)
The humpback is the showman of the whale world — the species that breaches, tail-slaps, flipper-waves, and spy-hops. The word “acrobatic” is earned.
How to identify at sea:
- Extraordinarily long pectoral fins — up to 5 metres, about 1/3 of body length; white on most North Atlantic populations
- Knobby tubercles (rounded bumps) on the head, rostrum, and jaw — unique to humpbacks
- When diving, raises the tail fluke above the surface — each fluke has unique black and white markings used for individual identification (the GREMM photo-ID catalogue has hundreds of individually identified Saint-Laurent humpbacks)
- Blow: wide and bushy
Typical behaviour: Humpbacks are the most behaviourally engaging whale species in the Saint-Laurent. Common surface behaviours:
- Breaching: the whale launches most or all of its body clear of the water and crashes back with an enormous splash. The sound of a breaching humpback can be heard from kilometres away. Function: possibly communication, parasite removal, or play.
- Tail-slapping: repetitive striking of the fluke against the surface. Often done in sequences.
- Flipper-slapping: lying on the side and raising a pectoral fin to slap the surface.
- Spy-hopping: rising vertically above the surface to “look around.” A humpback spy-hop brings the whale’s head and part of the body above the water in an upright position.
Not every humpback puts on a show — some dive and feed quietly. But the probability of seeing some surface behaviour with humpbacks is far higher than with blue or fin whales.
4. Minke whale (Balaenoptera acutorostrata)
Status in Saint-Laurent: year-round (rare in winter), common April–October Size: 8–10 metres, 7–10 tonnes Conservation status: least concern
The minke (pronounced MIN-key) is the smallest baleen whale in the Saint-Laurent and the most frequently seen on tours. It is abundant, curious, and sometimes approaches boats voluntarily.
How to identify at sea:
- Small size — nothing else in the Saint-Laurent combines baleen whale characteristics with this body size
- Pointed snout (more sharply pointed than other rorquals)
- White band across the pectoral fin — clearly visible
- Small, curved dorsal fin approximately 2/3 of the way back on the body
- Blow: very small and diffuse — almost invisible in warm weather; visible in cold air or against dark background
- Fast and erratic at the surface — appears, breathes 1–3 times, disappears unpredictably
Typical behaviour: Minkes are less predictable than larger species. They sometimes bow-ride in front of boats, sometimes flee, and sometimes ignore vessels entirely. Their small blow makes them harder to spot at distance.
5. North Atlantic right whale (Eubalaena glacialis)
Status in Saint-Laurent: rare visitor Size: up to 18 metres Conservation status: critically endangered (~350 individuals remaining)
Right whales are rarely seen in the Tadoussac area but occasionally transit through the Gulf of St. Lawrence. Any sighting should be reported to Transport Canada and DFO (Department of Fisheries and Oceans) — these animals are so critically endangered that each individual encounter is scientifically significant.
How to identify: highly arched upper jaw, no dorsal fin, distinctive rough patches on the head (callosities) that appear cream-coloured due to whale lice infestations.
The toothed whale species
6. Beluga whale (Delphinapterus leucas)
Status in Saint-Laurent: year-round resident Size: 3–5 metres, 700–1,500 kg Conservation status: endangered (Saint-Laurent population ~900 individuals)
The white whale of the Saint-Laurent is one of Québec’s most iconic wildlife symbols and one of its most important conservation challenges. The population that lives year-round in the Saint-Laurent estuary is a distinct subpopulation, genetically isolated from other beluga populations in the Arctic. After commercial hunting eliminated most of the population (from ~10,000 to ~1,000 by the mid-20th century), hunting was banned in 1979. Recovery has been slow — the population has stabilised at around 900 individuals but has not grown as expected.
How to identify: the only white whale in the Saint-Laurent. Adults are pure white; juveniles are grey or brown, gradually whitening over 7–10 years. They travel in fluid social groups (pods) of 5–50+ individuals.
Critical rule: no boat approach. All motorised vessels must stay 400 metres from belugas under Canadian federal law. Observe from shore only — see the shore whale watching guide for the best viewing locations.
From shore: Pointe-Noire (across from Tadoussac) and Cap-de-Bon-Désir (30 km east) are the best observation points. Belugas are commonly observed feeding in the shallows, socialising in groups, and occasionally raising their heads (spy-hopping) at the surface.
7. Sperm whale (Physeter macrocephalus)
Status in Saint-Laurent: very rare visitor Conservation status: vulnerable
The largest toothed animal on earth (males up to 18 metres). Documented occasionally in the Gulf of St. Lawrence but very rare near Tadoussac. The estuary is too shallow for their deep-diving hunting behaviour. If seen, identifiable by the distinctive square head and angled blow.
The small cetaceans: dolphins and porpoises
8. Atlantic white-sided dolphin (Lagenorhynchus acutus)
Status in Saint-Laurent: seasonal, summer and fall, fairly common Size: 2–2.8 metres
Fast-moving social dolphins that travel in pods of 10–500+ individuals. Often bow-ride in front of boats. Identifiable by the yellow/tan patch on the flank behind the dorsal fin.
9. White-beaked dolphin (Lagenorhynchus albirostris)
Status in Saint-Laurent: occasional visitor Size: 2.5–3 metres
Similar to white-sided dolphin but with a distinctive white or pale grey beak. Less common in the estuary than white-sided.
10. Long-finned pilot whale (Globicephala melas)
Status in Saint-Laurent: occasional visitor Size: up to 6 metres
Dark grey to black with distinctive rounded melon-shaped head. Travel in large social groups (pilot refers to the “pilot” or leader of the group). Occasionally seen in the Gulf of St. Lawrence.
11. Orca (killer whale) (Orcinus orca)
Status in Saint-Laurent: rare but documented visitor Size: males up to 9 metres
Occasionally documented in the Gulf of St. Lawrence and very rarely near Tadoussac. Identifiable by the dramatic black-and-white colouring and tall dorsal fin (males have dorsal fins up to 1.8 metres). Any orca sighting at Tadoussac is noteworthy.
12. Harbour porpoise (Phocoena phocoena)
Status in Saint-Laurent: common year-round Size: 1.4–1.9 metres
The smallest cetacean in the Saint-Laurent and one of the most frequently seen from shore and boats. Dark grey/brown back, pale belly, small triangular dorsal fin. Fast and often shy — seen briefly at the surface before disappearing. Often visible from ferry crossings and shore viewpoints.
13. Common dolphin (Delphinus delphis)
Status in Saint-Laurent: occasional visitor, usually warm years Size: 1.7–2.4 metres
The classic dolphin with hourglass colouring (grey and yellow/tan patterning on the flank). More common in the Gulf of St. Lawrence than in the estuary; occasional visitor to the Tadoussac area in warm summers.
How to improve your observation and identification skills
Before the tour:
- Download the GREMM cetacean guide (available at whales-online.net in English and French) — it covers all Saint-Laurent species with photo identification aids
- Watch video footage of whale blows, dorsal fins, and surface behaviours for each species — pattern recognition at sea is much faster if you have seen it before
- Learn to distinguish the blow shapes and heights: blue whale (tall, wide), fin whale (tall, narrow), humpback (bushy), minke (barely visible)
On the boat:
- Position yourself on the windward side of the upper deck for the best sightlines
- Scan the horizon continuously, not just where others are looking — sometimes a distant spout appears 180 degrees from where everyone is focused
- Binoculars (8x42 or 10x42) are valuable for identifying species at distance before the boat repositions
Photography tips:
- For zoom photography, a 300–400mm lens (or equivalent) is ideal. In bright conditions, use a fast shutter speed (1/1000s or faster) to freeze whale motion.
- For humpback fluke shots, anticipate the dive sequence — blow 3–4 times, then watch for the arching back before the tail raises
3-Hour Whale Watching Boat Tour (Tadoussac) — the standard tour where you are most likely to encounter multiple species. Naturalist guides onboard assist with identification. Around 80 CAD per adult.
For the best timing to see specific species, see the month-by-month whale watching guide. For shore-based beluga observation, see the Bergeronnes and Escoumins guide.
Frequently asked questions about Whales of the Saint-Laurent: 13 species you can see
What is the most commonly seen whale at Tadoussac?
The minke whale (petit rorqual) is the most frequently encountered baleen whale on tours near Tadoussac. It is the smallest baleen whale species in the area (8-10 m), abundant, and present throughout the May-October season. Fin whales are the most commonly seen large whale. Belugas are always visible from shore.How do I identify a blue whale vs a fin whale?
Blue whale: much larger (up to 30 m vs 25 m for fin), blue-grey mottled colouring, small dorsal fin set very far back, extraordinarily long back that rolls and rolls before the fluke appears. Fin whale: distinctive white right-jaw patch (asymmetric colouring unique in nature), slightly more curved dorsal fin, faster swimmer. Both have a very tall blow (spout) — the blue whale's is slightly taller and wider.Why are belugas endangered in the Saint-Laurent?
The Saint-Laurent beluga population declined from an estimated 10,000 individuals before commercial whaling began to approximately 900 today. Contributing factors include historical hunting (stopped in 1979), habitat contamination (industrial chemicals in the river, particularly polychlorinated biphenyls and heavy metals), boat disturbance during critical feeding and calving periods, and reduced prey availability. Recovery is slow — the population has shown some improvement since the 1980s but remains critically below historical levels.Can I see sperm whales at Tadoussac?
Sperm whales are very rare visitors to the Saint-Laurent estuary — documented occasionally but not a species you can expect to see. They are deep-water hunters (diving to 1,000+ metres for squid) and the Saint-Laurent estuary is too shallow for their typical behaviour. Sightings in the Gulf of St. Lawrence, further east, are more frequent.What is the best cetacean to watch for photography?
Humpback whales offer the most photographic opportunities — they breach (leap from the water), tail-slap, flipper-slap, and spy-hop more than other species. Each fluke (tail) has unique markings used for individual identification. Belugas from shore (white colouring against dark water) are highly photogenic. Blue whales are the most dramatic subject but show less surface behaviour.
Top experiences
Bookable activities with verified prices and instant confirmation on GetYourGuide.
