Lagenorhynchus

Common Names

Dolphins belonging to the genus Lagenorhynchus are commonly referred to as "white-sided dolphins" due to their prominent white stripes on their flanks. However, specific species within the genus have their own common names, such as:

• White-beaked dolphin (Lagenorhynchus albirostris)
• Pacific white-sided dolphin (Lagenorhynchus obliquidens)
• Dusky dolphin (Lagenorhynchus obscurus)
• Hourglass dolphin (Lagenorhynchus cruciger)
• Peale's dolphin (Lagenorhynchus australis)
• Black-chinned dolphin (Lagenorhynchus australis)
• South American dolphin (Lagenorhynchus cruciger)

Characteristics

Lagenorhynchus dolphins are generally smaller than other oceanic dolphins, with most species reaching lengths between 1.5 and 2.5 meters. They are characterized by their slender bodies, pointed snouts, and relatively small dorsal fins. Their coloration varies between species, but typically features a dark dorsal surface, a white ventral surface, and distinctive black and white stripes on the flanks. The stripes can be horizontal, vertical, or diagonal, depending on the species.

Environments

Lagenorhynchus dolphins are found in a variety of marine environments, including coastal waters, open oceans, and estuaries. They prefer temperate and cold waters, with most species inhabiting the Southern Hemisphere and the colder regions of the Northern Hemisphere. Some species, like the dusky dolphin, are found in coastal waters and estuaries, while others, like the white-beaked dolphin, are more pelagic and inhabit open oceans.

References

For more detailed information on Lagenorhynchus, you can consult these reliable online resources:

• WhaleFacts
• MarineBio
• IUCN Red List