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 across
Also 9.843 in
Defined bell diameter · defined specimen
Typical recorded range: 20 cm to 30 cm.
A little perspective
About the same scale as Axolotl.
Axolotl: An axolotl is an aquatic salamander from Mexico that retains its larval features and external gills throughout its life.
Measurements, assumptions & sources +
Moon jellyfish
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
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.
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Why this measurement?
Why we use 25 cm
For comparison, this page uses defined bell diameter. This is labelled defined specimen: an explicit comparison model rather than a claim that every example has the same value. 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 named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
Moon jellyfish 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 |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
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Want to check the number?
The source records and measurement method remain available for inspection.
There’s always another scale
Follow your curiosity.
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