Orange-blaze Roundhead
Tenellia ornata
- Usual depth3–20 m
- Water temperature13–30 °C
- Best monthsJanuary, March, and April
- How commonRare
About this species
Trinchesia ornata is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Trinchesiidae.
Text from the Wikipedia article “Trinchesia ornata”, 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: 19 records
- February: 15 records
- March: 29 records
- April: 27 records
- May: 15 records
- June: 15 records
- July: 9 records
- August: 8 records
- September: 5 records
- October: 4 records
- November: 6 records
- December: 17 records
Depth and water temperature
Depth
Mostly recorded at 3–20 m · Deepest record: 68.6 m
Water temperature
Recorded in surface water of 13–30 °C
Names and classification
- English
- Orange-blaze Roundhead
Names in 1 more languages
- Japanese
- フジエラミノウミウシ
Other scientific names: Catriona ornata, Cuthona (Hervia) ornata, Cuthona ornata, Trinchesia ornata
Similar species

drab aeolidPhestilla sibogae
Blackgill TenelliaPhestilla melanobrachia
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).
- 175 open-data records from 1986 to 2026.
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