Guyana Dolphin

Fascinating facts about the Guyana Dolphin

• The Guiana dolphin belongs to the oceanic dolphin family and inhabits coastal and estuarine waters of northern South America. Recent research has demonstrated that this species possesses an electroreceptive sense, a capability that scientists think may also occur in other toothed whales. This sensory ability adds to the dolphin's suite of adaptations for navigating the shallow, often murky habitats it frequents.
• In December 2006, six adult Guiana dolphins were observed in Sepetiba Bay, Brazil, separating a mother from her calf and then violently attacking the young. Four adults rammed the mother while the remaining two repeatedly forced the calf underwater, lifted it into the air and held it down again. Such coordinated aggression resulted in the calf's disappearance and, although infanticide is known in bottlenose dolphins, it is considered rare among cetaceans.
• Surveys of Guanabara Bay show a dramatic decline in Guiana dolphin numbers over recent decades. In 1985 about 400 individuals were recorded, falling to 70 by 1995 and only 34 in a 2016 count, and by 2024 the population had dropped below 30. The steep reduction coincides with the bay's severe pollution from industrial waste and sewage, underscoring the vulnerability of this coastal cetacean to habitat degradation.
• Guiana dolphins normally travel in small pods of two to six individuals, but they are capable of forming much larger gatherings. Observations show that, on occasion, groups can swell to several hundred animals, highlighting a capacity for large-scale social assembly. These massive aggregations are not everyday events and tend to occur in particular seasons when group size and behaviour shift.
• Guiana dolphins can exceed four decades of age, a notable longevity for a coastal cetacean. Growth-layer analysis of their teeth indicates individuals may live more than 40 years, suggesting a slow life history compared with many smaller marine mammals. Such a lifespan allows them to experience multiple breeding cycles and to maintain long-term familiarity with their home estuarine habitats.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Guyana Dolphin

In the warm, crystal-clear waters of the Caribbean, the Guyana dolphin glides effortlessly, its sleek, grey body undulating as it navigates the coral reefs and estuaries with a gentle, almost ethereal elegance. With a curious and social nature, it moves through the ocean with a quiet confidence, its clicks and whistles echoing through the water as it communicates with its pod, a symphony of sound that resonates through the marine landscape. As it breaks the surface, its dorsal fin slices through the waves, a fleeting glimpse of a creature that embodies the very essence of the tropical sea.

More ocean life to discover

Browse Feravox