Long-Snout Cavoline

Diacavolinia longirostris

Molluscs
IUCN: Not evaluated

Usual depth0–319 m
Water temperature16–30 °C
Best monthsNovember
How commonOccasional

All species

Photo credit: (c) Saryu Mae 前朝琉, some rights reserved (CC BY) · CC BY · iNaturalist

About this species

Diacavolinia longirostris is a species of sea butterfly. It is a pteropod.

Text from the Wikipedia article “Diacavolinia longirostris”, 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: 15 records
February: 30 records
March: 24 records
April: 17 records
May: 21 records
June: 17 records
July: 31 records
August: 19 records
September: 27 records
October: 30 records
November: 64 records
December: 12 records

Depth and water temperature

Depth

Mostly recorded at 0–319 m · Deepest record: 1,778 m

0–10 m: 19 records
10–20 m: 4 records
20–30 m: 5 records
30–40 m: 4 records
40–50 m: 3 records
50–60 m: 7 records
60–70 m: 2 records
70–80 m: 8 records
80–90 m: 1 records
90–100 m: 0 records
100–110 m: 0 records
110+ m: 14 records

Water temperature

Recorded in surface water of 16–30 °C

14–16 °C: 1 records
16–18 °C: 18 records
18–20 °C: 10 records
20–22 °C: 40 records
22–24 °C: 39 records
24–26 °C: 104 records
26–28 °C: 160 records
28–30 °C: 94 records

Photos

Names and classification

English: Long-Snout Cavoline

Names in 3 more languages

Japanese: ササノツユ
Korean: 세모거북고둥
Thai: ผีเสื้อทะเลหนามยาว

Other scientific names: Cavolinia fissilabris, Cavolinia longirostris, Diacavolinia constricta, Diacavolinia deblainvillei, Diacavolinia deshayesi, Diacavolinia ovalis, Hyalaea longirostris, Hyalea longirostra

Similar species

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).
1,306 open-data records from 1821 to 2023.
Species data updated October 26, 2026.

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