John Dory

Picture of John Dory Fish

Description of the John Dory

The John Dory is a marine fish with a flat body featuring a large false eye on its body. The John Dory uses its false eye to warn predators and confuse prey. There is some speculation over the origins of the name 'John Dory'. Some believe its name is derived from the French word 'Jaune' meaning yellow while legend describes the dark spot or false eye as St Peter's thumbprint. The John Dory is a popular food source and is eaten all over the world.

Picture of a John Dory

John Dory

Facts - Information - Picture

Popular Name: John Dory
Species: Zeus Faber

Profile of the John Dory
This Profile contains interesting facts and information about the John Dory species.

  • Size: Can grow up to 90cm but usually around 40cm

  • Fish Tank conditions: Large Tank, PH 6.0 to 8.0

  • Diet / Feeding: Bony Fish, Squid, Sardines

  • Temperament: Solitary Fish

  • Habitat: Up to 400m meters in tropical & sub-tropical coastal marine waters

  • Behaviour: A solitary fish that can be found close to the sea bed

  • Range: Eastern Atlantic, Indian Ocean, Western Pacific, Eastern Atlantic, Black Sea, Mediterranean

Scientific Classification of the John Dory
Definition: Scientific classification, or biological classification, is how biologists group and categorize species of organisms with shared physical characteristics. Scientific classification belongs to the science of taxonomy.

  • Species: Zeus Faber

  • Popular Name: John Dory, St Peter's Fish

  • Kingdom: Animalia

  • Phylum: Chordata

  • Class: Actinopterygii

  • Order: Zeidae

  • Family: Zeidae

Interesting Facts and Information - How do you identify the sex of a John Dory?
The males and females of many fish species have different colors or different shaped bodies. But there are also other fish species where there is no visible difference. Its sometimes tricky being an ichthyologist!

Interesting Facts and Information - Why are John Dory slimy?
John Dory secrete a type of mucus, or slime, from their skin. This slime provides protection against parasites and infections and helps the John Dory to move through the water faster. Some fish species also release toxins in their slime which ward off enemy attacks. Other fish species use their slime to feed their young.

Interesting Facts and Information -
Why do John Dory have gills?
Gills enable the John Dory to breathe. Gills consist of thin sheets of tissue containing blood vessels. As water passes over the gills oxygen is absorbed into the blood stream Carbon dioxide passes out into the water. The gills are protected by a large bony plate called an operculum. Some fish species however have lungs and breathe air.

Interesting Facts and Information -
Why do the John Dory have fins?
A fin is an external appendage or "limb" of a fish. Fins are used for directing, stabilizing, or propelling the different fish species in water. Numbers of fins vary between fish species, but there are usually seven. Each of the fins on a fish are designed to perform a specific function:

  • Dorsal fins - The dorsal fin is located on the backs of fishes. The John Dory has Dorsal fins to lend stability in swimming.

  • Ventral fins. The ventral fin is located on the pelvic area of fishes. The John Dory has Ventral fins to lend stability in swimming.

  • Caudal fins. The Caudal fin is located on the tail area of fishes. The John Dory has Caudal fins to propel through the water.

  • Pectoral fins. The Pectoral fin is located on the breast area of fishes. The John Dory has Pectoral fins to for locomotion and side to side movement

Interesting Facts and Information about John Dory

John Dory

  • Interesting Information about John Dory

  • Facts about Fish Species - Why are John Dory slimy?

  • Why do the John Dory have gills?

  • Facts about Fish Species - Why do the John Dory have fins?

  • Species: Zeus Faber

Fish Species

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