Four-and-four Sea Star

Allostichaster polyplax

Other invertebrates
IUCN: Not evaluated

Usual depth0–33 m
Water temperature11–23 °C
Best monthsJanuary, February, and March
How commonOccasional

All species

Where and when

Where it has been recorded

Worldwide

Loading the map

Best months

Worldwide (open data)

January: 37 records
February: 36 records
March: 47 records
April: 32 records
May: 15 records
June: 14 records
July: 6 records
August: 4 records
September: 9 records
October: 11 records
November: 30 records
December: 25 records

Depth and water temperature

Depth

Mostly recorded at 0–33 m · Deepest record: 177 m

0–10 m: 54 records
10–20 m: 10 records
20–30 m: 2 records
30–40 m: 2 records
40–50 m: 0 records
50–60 m: 0 records
60–70 m: 1 records
70–80 m: 1 records
80–90 m: 0 records
90–100 m: 0 records
100–110 m: 0 records
110+ m: 5 records

Water temperature

Recorded in surface water of 11–23 °C

10–12 °C: 4 records
12–14 °C: 25 records
14–16 °C: 160 records
16–18 °C: 91 records
18–20 °C: 30 records
20–22 °C: 41 records
22–24 °C: 1 records

Names and classification

English: Four-and-four Sea Star, Four and Four Seastar

Other scientific names: Asteracanthion polyplax, Asterias polyplax, Stichaster polyplax, Tarsaster neozelanicus

Similar species

Allostichaster farquhari
Allostichaster insignis
Paddle-spined seastar
Allostichaster palmula
Allostichaster regularis

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).
743 open-data records from 1891 to 2023.

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