What is being measured?
Comparison uses the midpoint of the published 30–49 cm range. The description reports mantle lengths of 30 cm in subtropical areas to 49 cm in temperate areas. This is a midpoint across published regional values, not an overall mean. This is a range midpoint, not a measured population mean.
The comparison uses the midpoint of the stated range. That midpoint is a chosen reference, not a measured population mean.
- Dimension
- mantle length
- Reference value
- 39.5 cm
- Evidence
- Chosen midpoint of a documented range
- In metres
- 0.395 m
- Variant
- Mantle only; geographic range
- Source range
- 30–49 cm
- What the range means
- The description reports mantle lengths of 30 cm in subtropical areas to 49 cm in temperate areas. This is a midpoint across published regional values, not an overall mean.
Put the length in perspective
One Common cuttlefish — mantle represents approximately 4.61 card lengths measured end to end. This is a length ratio; it does not calculate how the objects pack or fit.
Common cuttlefish — mantle · 0.395 m
Metre · 1 m
Foot (international) · 0.3048 m