Cycloachelous orbitosinus

Crustaceans
IUCN: Not evaluated

Usual depth14–54 m
Water temperature20–29 °C
Best monthsFebruary, April, and June
How commonRare

All species

Where and when

Where it has been recorded

Worldwide

Loading the map

Best months

Worldwide (open data)

January: 0 records
February: 14 records
March: 0 records
April: 9 records
May: 5 records
June: 13 records
July: 1 records
August: 6 records
September: 2 records
October: 7 records
November: 1 records
December: 2 records

Depth and water temperature

Depth

Mostly recorded at 14–54 m · Deepest record: 310 m

0–10 m: 4 records
10–20 m: 40 records
20–30 m: 33 records
30–40 m: 38 records
40–50 m: 29 records
50–60 m: 13 records
60–70 m: 5 records
70–80 m: 3 records
80–90 m: 0 records
90–100 m: 1 records
100–110 m: 1 records
110+ m: 1 records

Water temperature

Recorded in surface water of 20–29 °C

20–22 °C: 6 records
22–24 °C: 7 records
24–26 °C: 124 records
26–28 °C: 98 records
28–30 °C: 7 records

Names and classification

Names in 1 more languages

Japanese: メダマヒメガザミ

Other scientific names: Neptunus (Achelous) orbitosinus, Portunus (Achelous) orbitosinus, Portunus orbitosinus

Similar species

Cycloachelous granulatus
Cycloachelous suborbicularis
Blue swimming crab
Portunus pelagicus
Asian paddle crab
Charybdis (Charybdis) japonica
Charybdis (Archias) longicollis
Charybdis (Archias) truncata

Sources and credits

Names and taxonomy: WoRMS (CC BY 4.0) and the GBIF Backbone (CC BY 4.0). Photos: iNaturalist observers, each under the licence shown (CC0, CC BY or CC BY-SA).

Depth, temperature, months and maps: records from OBIS and GBIF under CC0 or CC BY.
Conservation status as published by GBIF (IUCN Red List).
323 open-data records from 1911 to 2017.
Species data updated November 1, 2026.

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