Moon Jellyfish (Aurelia coerulea) Click to enlarge image
Moon Jellyfish, Aurelia coerulea are an abundant jellyfish species that can be found in temperate and tropical oceans across the world – including Australia. Image: Keith Dickey
CC BY-NC 4.0

Fast Facts

  • Classification
    Genus
    Aurelia
    Species
    coerulea
    Family
    Ulmaridae
    Order
    Semaeostomeae
    Class
    Scyphozoa
    Phylum
    Cnidaria
    Kingdom
    Animalia
  • Size Range
    40 cm

Introduction

The Moon Jelly is a common ocean animal and can sometimes be extremely abundant.


What do Moon Jellies look like?

Identification

It has a transparent jelly-like bell with four horseshoe-shaped, pinkish reproductive organs that surround a square mouth. At each corner of the mouth a feeding tentacle hangs down into the water below.


A translucent Moon Jellyfish floating underwater, viewed from the side, with fine trailing tentacles
Moon Jellyfish, Aurelia coerulea are an abundant jellyfish species that can be found in temperate and tropical oceans across the world – including Australia. Image: Frédéric Andre
CC BY-NC 4.0

Where do Moon Jellies live?

Habitat

Moon Jellies live in oceans, coastal waters and estuaries.

Distribution

Moon Jellies are found throughout Australia.


Distribution data sourced from the Atlas of Living Australia

What do Moon Jellies eat?

Feeding and diet

At each corner of the mouth in Moon Jellies a feeding tentacle hangs down into the water below. These are equipped with stinging cells (nematocysts) to capture small prey that are dragged inward towards the mouth.


How have Moon Jellies adapted?

Other behaviours and adaptations

The outer edge of the Moon Jelly's bell also has tentacles, as well as eight special sensory organs that tell the jellyfish where it is in the water column. Currents may sweep many of these jellyfish into sheltered bays and they are often washed up on beaches.

Predators

The Moon Jelly is one of the favourite foods of many species of turtles.