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
Acropora cythereacoral (Acropora cytherea)
Acropora cythereacoral
(Acropora cytherea)
Atlantic sea nettle (Chrysaora quinquecirrha)
Atlantic sea nettle
(Chrysaora quinquecirrha)
Fried egg jellyfish (Cotylorhiza tuberculata)
Fried egg jellyfish
(Cotylorhiza tuberculata)
Labyrinthine brain coral (Diploria labyrinthiformis)
Labyrinthine brain coral
(Diploria labyrinthiformis)
Magnificent sea anemone (Radianthus magnifica)
Magnificent sea anemone
(Radianthus magnifica)
Many-ribbed jellyfish (Aequorea forskalea)
Many-ribbed jellyfish
(Aequorea forskalea)
Portuguese man of war (Physalia physalis)
Portuguese man of war
(Physalia physalis)
Slimy sea plume (Antillogorgia americana)
Slimy sea plume
(Antillogorgia americana)
The marine species from Mediterranean sea
Black-faced blenny (Tripterygion delaisi)
Black-faced blenny
(Tripterygion delaisi)
Fried egg jellyfish (Cotylorhiza tuberculata)
Fried egg jellyfish
(Cotylorhiza tuberculata)
Ocean sunfish (Mola mola)
Ocean sunfish
(Mola mola)
Orange flatworm (Yungia aurantiaca)
Orange flatworm
(Yungia aurantiaca)
Purple-striped jelly (Pelagia noctiluca)
Purple-striped jelly
(Pelagia noctiluca)
Spiny starfish (Marthasterias glacialis)
Spiny starfish
(Marthasterias glacialis)
Yellow encrusting sea anemone (Parazoanthus axinellae)
Yellow encrusting sea anemone
(Parazoanthus axinellae)

Our latestUpdates

The queen triggerfish
Tuesday, September 16th 2025
The queen triggerfish
Discover the queen triggerfish (Balistes vetula), a colorful Atlantic reef fish known for its strong jaws, unique feeding techniques and fascinating reproductive habits.
The bump-head sunfish
Friday, September 5th 2025
The bump-head sunfish
Learn about the bump-head sunfish (Mola alexandrini), the world's heaviest bony fish, its habitat in tropical and temperate oceans, diet of jellyfish, deep-water behavior and record size over 6,000 lbs.
The chocolate chip sea cucumber
Wednesday, September 3rd 2025
The chocolate chip sea cucumber
The chocolate chip sea cucumber has a massive cylindrical body that is beige in color, covered with a set of dark brown pustules resembling chocolate chips that protrude slightly from the surface, giving it a resemblance to a cookie, hence its french name. It can reach a length of about 12 inches when fully grown.
Photo of the Day
Poisson perroquet royal (Scarus vetula)
Poisson perroquet royal
(Scarus vetula)