Raven's wing
Electroma alacorvi
- Usual depth1–22 m
- Water temperature16–30 °C
- Best monthsJanuary, February, and December
- How commonRare
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 13 records
- February: 10 records
- March: 6 records
- April: 1 records
- May: 1 records
- June: 2 records
- July: 5 records
- August: 5 records
- September: 3 records
- October: 4 records
- November: 1 records
- December: 9 records
Depth and water temperature
Depth
Mostly recorded at 1–22 m · Deepest record: 21.5 m
Water temperature
Recorded in surface water of 16–30 °C
Names and classification
- English
- Raven's wing, raven's wing, Smaragdina Little Wing Shell
Names in 2 more languages
- Japanese
- シマウグイス
- Korean
- 전기줄무늬진주조개
Other scientific names: Avicula cochenhauseni, Avicula costellata, Avicula electrina, Avicula flammata, Avicula japonica, Avicula livida, Avicula malleoides, Avicula pulchella, Avicula rutila, Avicula smaragdina, Avicula spadicea, Electroma (Electroma) ovata, Electroma japonica, Electroma ovata, Electroma pygmaea, Electroma tragulata, Margaritifera semiaurita, Meleagrina ovata, Meleagrina tongana, Mytilus alacorvi, Mytilus meleagridis, Pteria malleoides, Pteria spadicea
Similar species
common butterfly shellElectroma papilionacea
- Painted tree-oyster
Crenatula picta
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).
- 101 open-data records from 1817 to 2021.
- Species data updated November 2, 2026.
Log what you see on your next dive
The free DiveHive diver app keeps your logbook with every sighting and shows what lives at the site you dive next.