DiscoverSpeciesCorals and anemones
Crab anemone
Triactis producta
- Usual depth0–15 m
- Water temperature22–29 °C
- Best monthsMarch, April, and May
- How commonRare
Photo credit: (c) Cricket Raspet, some rights reserved (CC BY) · CC BY · iNaturalist
About this species
Triactis is a genus of sea anemone in the family Aliciidae. It is monotypic, having only one species – Triactis producta. This species is found in shallow waters in the Indo-Pacific where it lives on the seabed, rocks and corals. It derives much of its energy needs from the symbiotic algae it contains. It also forms a mutualistic relationship with small Lybia crabs.
Text from the Wikipedia article “Triactis”, licensed CC BY-SA 4.0. Read the article
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 13 records
- February: 13 records
- March: 33 records
- April: 28 records
- May: 31 records
- June: 23 records
- July: 13 records
- August: 8 records
- September: 20 records
- October: 20 records
- November: 27 records
- December: 18 records
Depth and water temperature
Depth
Mostly recorded at 0–15 m · Deepest record: 25 m
Water temperature
Recorded in surface water of 22–29 °C
Photos
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist 
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist 
(c) Tom Heijnen, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) portioid, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Cricket Raspet, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) portioid, some rights reserved (CC BY) · CC BY · iNaturalist 
no rights reserved · CC0 1.0 · iNaturalist
Names and classification
- English
- Crab anemone, crab anemone, Girdled Anemone, Prolific Anemone
Names in 3 more languages
- German
- Krabbenanemone
- French
- Anémone à double détente
- Japanese
- カサネイソギンチャク, カニハサミイソギンチャク
Other scientific names: Actinia prehensa, Buneodopsis prehensa, Bunodeopsis prehensa, Hoplophoria cincta, Phyllodiscus cincta, Phyllodiscus cinctus, Phyllodiscus indicus, Sagartia prehensa, Sagartia pugnax, Triactis cincta, Viatrix cincta
Similar species
- Tuberculate night anemone
Alicia sansibarensis
- Hell's fire sea anemone
Phyllodiscus semoni
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.
- Descriptions: Wikipedia, licensed CC BY-SA, each linked to its article.
- Conservation status as published by GBIF (IUCN Red List).
- 151 open-data records from 2000 to 2023.
- Species data updated October 26, 2026.
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