Killer Whale

Open encyclopedia reference

The orca (Orcinus orca), or killer whale, is a toothed whale and the largest member of the oceanic dolphin family. The only extant species in the genus Orcinus, it is recognizable by its distinct pigmentation; being mostly black on top, white on the bottom and having recognizable white eye patches. A cosmopolitan species, it inhabits a wide range of marine environments, from Arctic to Antarctic regions to tropical seas, but is more commonly documented in temperate or cooler coastal waters. Scientists have proposed dividing the global population into races, subspecies, or possibly even species. Orcas are apex predators with a diverse diet. Individual populations often specialize in particular types of prey, including bony fish, sharks, rays, and marine mammals such as seals, dolphins, and whales. They are highly social, with some populations forming stable matrilineal family groups (pods). Their sophisticated hunting techniques and vocal behaviours, often unique to specific groups and passed down from generation to generation, are considered to be manifestations of animal culture.

Wikipedia contributors, Orca; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T01:19:40.020743+00:00. This reference remains separate from the taxonomic record.

Identity & source status

Scientific name

Orcinus orca (Linnaeus, 1758)

Name authority

(Linnaeus, 1758)

Common name

Killer Whale

Rank

species

Accepted status

accepted

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Cetacea

Family

Delphinidae

Genus

Orcinus

Extinction status

Recorded extant

Classification family tree

Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.

1. domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
2. kingdomAnimalia
3. phylumChordata
4. subphylumVertebrata
5. infraphylumGnathostomata
6. parvphylumOsteichthyes
7. megaclassTetrapoda
8. classMammalia Linnaeus, 1758
9. subclassTheria Parker & Haswell, 1897
10. infraclassEutheria Gill, 1872
11. orderCetacea Brisson, 1762
12. suborderOdontoceti Flower, 1867
13. familyDelphinidae Gray, 1821
14. genusOrcinus Fitzinger, 1860
15. speciesOrcinus orca (Linnaeus, 1758)

Close classified relatives

These entries share the source’s genus, Orcinus. They are not necessarily the closest relatives established by molecular evidence.

Browse 32 records assigned to Delphinidae.

Names & synonyms

Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.

Documented distribution

Source distribution statements, not a complete range map. A listed locality is not necessarily a place of origin.

Source literature & publication evidence

References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.

1. https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=180469 Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references

Origins, evidence & remaining research

Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.

Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record.

Dataset citation & attribution

This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11

Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.

Stable key: col:74SZC. Classification follows source parent identifiers. English common names may vary by region.