Blue-ringed Swallowtail

About this species

Chelidonura livida is a species of sea slug, or "headshield slug", a marine opisthobranch gastropod mollusk in the family Aglajidae.

Text from the Wikipedia article “Chelidonura livida”, licensed CC BY-SA 4.0. Read the article

Where and when

Where it has been recorded

Worldwide

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Best months

Worldwide (open data)

January: 11 records
February: 10 records
March: 20 records
April: 23 records
May: 14 records
June: 13 records
July: 6 records
August: 5 records
September: 6 records
October: 9 records
November: 20 records
December: 9 records

Depth and water temperature

Depth

Mostly recorded at 7–12 m · Deepest record: 12 m

0–10 m: 1 records
10–20 m: 2 records

Water temperature

Recorded in surface water of 24–29 °C

24–26 °C: 9 records
26–28 °C: 9 records
28–30 °C: 7 records

Photos

(c) Ewout Knoester, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Tom Heijnen, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Daniel Benák, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Tom Heijnen, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Daniel Benák, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Blue-ringed Swallowtail, Blue-spotted Shield Slug

Names in 2 more languages

French: Chélinodure bleue
Japanese: アオテンツバメガイ

Similar species

Lovely Headshield Slug
Chelidonura amoena
T-bar Swallowtail
Chelidonura hirundinina
Chelidonura pallida
Blue velvet headshield slug
Chelidonura varians
Beautiful Swallowtail
Philinopsis speciosa
Headlight Swallowtail
Mariaglaja inornata

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).
47 open-data records from 2007 to 2024.
Species data updated October 26, 2026.