Sealife guideThe moon jellyfishAurelia aurita

Last updated on 09/02/2024 at 11:51 PM
Taxonomy
  • Common name: Moon jellyfish
  • French name: Méduse bleue, méduse lune, aurélie
  • Scientific name: Aurelia aurita (Linnaeus, 1758)
  • Family name: Ulmaridae
  • Order name: Semaeostomeae
  • Class name: The scyphozoans [Scyphozoa]
Description
The moon jellyfish has a flattened bell shape that averages about 12 inches in diameter. The bell has a regular shape with a scalloped edge.
The coloration of the moon jellyfish ranges from bluish to pinkish
The coloration of the moon jellyfish ranges from bluish to pinkish © | Dreamstime.com
The moon jellyfish is generally translucent, but its color can vary and take on a slightly bluish or pinkish hue depending on its age and diet.
Geographic range
The moon jellyfish is a common species found in temperate and tropical coastal waters of seas and oceans around the world. It is particularly found in the coastal waters of Northern Europe, the Caribbean sea, and the Red sea.
Habitat
Like all jellyfish, the moon jellyfish drifts with the currents and can be found along coastlines.
Diet
The moon jellyfish primarily feeds on small planktonic organisms and fish larvae, which it captures with its tentacles as it drifts with the currents.
Reproduction
The moon jellyfish has different forms of reproduction that include various developmental stages, such as larval planktonic forms and polyps, before taking its adult jellyfish form.
It can reproduce sexually by releasing male gametes into the seawater, which then fertilize the gametes still held by the female jellyfish. The fertilized eggs remain attached under the bell of the female jellyfish and develop into planktonic larvae.
Did you know ?
The moon jellyfish is capable of producing a faint bioluminescent glow in the dark. This bioluminescence is due to the presence of specific proteins in its jelly, allowing it to attract prey or defend itself against predators.
The moon jellyfish (Aurelia aurita)
The moon jellyfish (Aurelia aurita)
Due to climate change, jellyfish blooms, which are proliferations of jellyfish, occur regularly in certain regions of the world, and the moon jellyfish is one of the species responsible for these blooms, particularly in Northern Europe, where it is widespread.
Discover also
Atlantic sea nettle (Chrysaora quinquecirrha)
Atlantic sea nettle
(Chrysaora quinquecirrha)
Black sea nettle (Chrysaora achlyos)
Black sea nettle
(Chrysaora achlyos)
Blue jellyfish (Cyanea lamarckii)
Blue jellyfish
(Cyanea lamarckii)
Elkhorn coral (Acropora palmata)
Elkhorn coral
(Acropora palmata)
Labyrinthine brain coral (Diploria labyrinthiformis)
Labyrinthine brain coral
(Diploria labyrinthiformis)
Lion's mane jellyfish (Cyanea capillata)
Lion's mane jellyfish
(Cyanea capillata)
Purple gorgonian (Paramuricea clavata)
Purple gorgonian
(Paramuricea clavata)
Yellow encrusting sea anemone (Parazoanthus axinellae)
Yellow encrusting sea anemone
(Parazoanthus axinellae)
The marine species from Mediterranean sea
Five-spotted wrasse (Symphodus roissali)
Five-spotted wrasse
(Symphodus roissali)
Mediterranean spider crab (Maja squinado)
Mediterranean spider crab
(Maja squinado)
Saddled seabream (Oblada melanurus)
Saddled seabream
(Oblada melanurus)
Spiny starfish (Marthasterias glacialis)
Spiny starfish
(Marthasterias glacialis)
Thornback ray (Raja clavata)
Thornback ray
(Raja clavata)
Violet sea urchin (Sphaerechinus granularis)
Violet sea urchin
(Sphaerechinus granularis)
Yellowmouth barracuda (Sphyraena viridensis)
Yellowmouth barracuda
(Sphyraena viridensis)
Zebra seabream (Diplodus cervinus)
Zebra seabream
(Diplodus cervinus)

Our latestUpdates

The dugong
Friday, January 30th 2026
The dugong
Discover the dugong, a gentle “sea cow” of tropical waters. Learn about its habitat, diet, reproduction, morphology, and the threats facing this unique marine mammal.
Dolphins: ocean's smartest creatures
Friday, January 23rd 2026
Dolphins: ocean's smartest creatures
Discover dolphins, the ocean's geniuses: explore their intelligence, social behavior, sophisticated communication, species diversity and vital role in marine ecosystems.
Hvar island
Friday, January 9th 2026
Hvar island
Hvar, a jewel of the Adriatic, captivates with its turquoise waters, wild coves and fragrant lavender fields. Between medieval villages, lively ports, and lush hills, Hvar island offers the perfect mix of relaxation, culture and breathtaking landscapes. Ideal for sun, sea and authentic experiences.
Photo of the Day
Poisson lapin à double barre (Siganus virgatus)
Poisson lapin à double barre
(Siganus virgatus)