Taxonomic placement
Currently the only recognized member of the genus Delphinus and part of the subfamily Delphininae.
Photo byMarkus Kammermann
Species Guide
What to know about common dolphins
A clean field guide focused on habitat, identification, behavior, and conservation context without burying the useful parts.
The common dolphin, Delphinus delphis, is the most abundant cetacean in the world with an estimated global population of about six million. It is currently the sole recognized member of the genus Delphinus and belongs to the subfamily Delphininae. Historically, populations were divided into two species—the short‑beaked and long‑beaked common dolphins—but these forms are now generally treated as ecotypes rather than separate species because long‑beaked populations have arisen multiple times from short‑beaked ancestors and do not consistently share the same derived traits. The common dolphin is closely related to several other delphinids, including the bottlenose, striped, spinner, Clymene, spotted, Fraser's, tucuxi, Guiana, and humpback dolphins. The species has cultural significance dating back to antiquity and frequently appears in Greek and Roman art, including Minoan murals.
Identification
How to identify common dolphins
The visual markers divers can use underwater, plus the species most likely to cause confusion.
Key identification markers
High abundance
Estimated global population of about six million, making it the most abundant cetacean.
Common lookalikes
Related delphinids
Close relatives include the bottlenose, humpback, striped, spinner, Clymene, spotted, Fraser's, tucuxi, and Guiana dolphins.
Population
Estimated numbers and what we actually know
Published estimates when credible, or an explicit note when no reliable global count exists.
Estimated global population of about six million.
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Responsible Encounters
How to dive with common dolphins
Conservation-minded guidance for divers who want the encounter without adding pressure.
Give common dolphin space, avoid blocking the animal's path, and follow local site and operator rules for wildlife interactions with dolphins.
Field Notes
Interesting things worth knowing
Useful species context that makes the encounter more meaningful once you are underwater.
Field notes
Cultural significance
Common dolphins frequently appeared in Greek and Roman art and in Minoan murals.
Taxonomic revision
Populations once split into short‑beaked and long‑beaked species are now generally regarded as ecotypes.
FAQ
Frequently asked questions
Clear planning and conservation answers written for search visibility and AI retrieval.
Research Sources
Common Dolphin information sources
Primary and credible references behind the field-guide and conservation claims on this page.
Sources 4Last Updated
Common Dolphins (Delphinus) | U.S. Fish & Wildlife Service · Reference · U.S. Fish & Wildlife Service
Primary wildlife guide source.
NOAA Fisheries · Reference · NOAA Fisheries
Supporting wildlife source.
OBIS · Reference · OBIS
Supporting wildlife source.
Common dolphin · Encyclopedia · Wikipedia
Supporting wildlife source.
Related Species
More in Dolphins
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