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John Dory

John Dory is a common name for fishes in the genus Zeus, especially Zeus faber, a demersal marine fish found in temperate waters.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

John Dory is a common name for fishes in the genus Zeus, especially Zeus faber, a demersal marine fish found in temperate waters. Known for its laterally compressed body and distinctive dark spot on each side, it is highly regarded as a food fish. Other names include St Pierre and Peter's fish.

Taxonomy and naming

John Dory is the common name used for fishes in the genus Zeus, especially Zeus faber. Other names include St Pierre and Peter's fish, reflecting folklore linked to the fish's dark side spot.

Physical description

The fish has a deep, laterally compressed body, a large head and mouth, and a characteristic dark mark on each side. Its body is often described as silvery to olive-yellow with long fin spines.

Distribution and habitat

John Dory occurs in temperate marine waters of the Eastern Atlantic and Indo-West Pacific, including the Mediterranean in some sources. It is a demersal species that usually lives near the seabed at moderate depths, ranging from about 5 m to 360 m depending on region. It is commonly associated with sandy, muddy, or rocky seabeds.

Ecology and diet

The species is an ambush predator that feeds on smaller fish and some invertebrates. It is generally solitary and uses its body shape and colouring to blend into its surroundings.

Human use

John Dory is considered a high-quality food fish with firm white flesh. It is caught commercially in some regions, often by trawl or as bycatch.

Key facts

  • John Dory usually refers to Zeus faber, the best-known species in the genus Zeus.
  • It is a laterally compressed fish with a distinctive dark blotch on each side of the body.
  • The species is found in temperate marine waters, including the Eastern Atlantic, Mediterranean, and Indo-West Pacific.
  • It lives near the seabed and is commonly associated with sandy, muddy, or rocky bottoms.
  • John Dory is widely valued as a table fish and is commercially important in some fisheries.
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Canadian context

John Dory is not a major native Canadian fish species, but it may appear in Canadian seafood markets as an imported product or in culinary references.

Frequently asked questions

What is a John Dory?
John Dory is a marine fish, usually referring to Zeus faber, known for its flattened body and dark side spot.
Why is it called St Peter's fish?
The name comes from a Christian legend linking the fish's dark mark to the fingerprint of Saint Peter.
Where does John Dory live?
It lives in temperate coastal waters of the Eastern Atlantic, Mediterranean, and Indo-West Pacific, usually near the seabed.
What does John Dory eat?
It is a predator that feeds mainly on smaller fish and some invertebrates.
Is John Dory eaten by people?
Yes. It is widely regarded as a good food fish and is commercially harvested in some fisheries.

References

  1. Wikipedia — https://en.wikipedia.org/wiki/John_Dory
    Supports: Common names and genus association with Zeus faber.
  2. Aquarium La Rochelle — https://www.aquarium-larochelle.com/en/species-encyclopedia/john-dory/
    Supports: Habitat, depth range, and solitary behaviour.
  3. Australian Museum — https://australian.museum/learn/animals/fishes/john-dory-zeus-faber/
    Supports: Scientific name, physical description, distribution, and food-fish status.
  4. Oceana — https://www.oceana.org/marine-life/john-dory/
    Supports: Distribution, depth range, diet, and general ecology.
  5. Seafish — https://www.seafish.org/media/ekihgjyw/seafishspeciesguide_johndory_201401.pdf
    Supports: Common name usage and value as a food fish.