Moon jellyfish
A moon jellyfish is a translucent marine animal recognised by the four horseshoe-shaped structures visible through its bell.
Also known as: moon jelly, Aurelia aurita
How big is it?
25 cm · defined bell diameter
Also 9.843 in
Defined bell diameter · defined specimen
Typical recorded range: 20 cm to 30 cm.
A little perspective
Moon jellyfish vs Axolotl: length comparison
The bell diameter of a moon jellyfish is approximately equal to the total length of an axolotl.
A moon jellyfish is a translucent marine animal recognised by the four horseshoe-shaped structures visible through its bell.
An axolotl is an aquatic salamander from Mexico that retains its larval features and external gills throughout its life.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions.
Measurements, assumptions & sources +
Moon jellyfish
Defined bell diameter: 25 cm; defined specimen; range 20 cm–30 cm.
A defined adult moon jellyfish with a 25 cm bell and 200 g wet mass. Bell size, water content and tentacle posture vary; trailing oral arms are excluded from the diameter.
Defined examples — our methodology
The marked defined bell diameter is calibrated. Unmeasured illustration details are representative.
Axolotl
Representative total length: 25 cm; representative; range 15 cm–30 cm.
A representative adult axolotl 25 cm long and 200 g. Captive adults vary substantially; external gills and the complete tail are included.
San Diego Zoo Wildlife Alliance — Axolotl
The marked representative total length is calibrated. Unmeasured illustration details are representative.
Use the visual comparison to explore its scale, then check the measurements and sources.
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Why this measurement?
Why we use 25 cm
We compare the bell diameter of a moon jellyfish. This is an illustrative comparison value, not a claim that every example is the same. The recorded range is 20 cm to 30 cm.
A defined adult moon jellyfish with a 25 cm bell and 200 g wet mass. Bell size, water content and tentacle posture vary; trailing oral arms are excluded from the diameter.
The marked horizontal span follows the measured feature, not the edges of the image. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 25 cm | 20 cm to 30 cm | defined specimen | |
| 200 g | 100 g to 400 g | defined specimen |
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Follow your curiosity.
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