Opalia granosa

Where and when

Where it has been recorded

Worldwide

Loading the map

Best months

Worldwide (open data)

January: 33 records
February: 11 records
March: 17 records
April: 7 records
May: 11 records
June: 13 records
July: 9 records
August: 12 records
September: 18 records
October: 8 records
November: 19 records
December: 14 records

Depth and water temperature

Depth

Mostly recorded at 0 m · Deepest record: 0 m

0–10 m: 35 records

Water temperature

Recorded in surface water of 14–29 °C

12–14 °C: 6 records
14–16 °C: 68 records
16–18 °C: 4 records
18–20 °C: 0 records
20–22 °C: 4 records
22–24 °C: 0 records
24–26 °C: 0 records
26–28 °C: 0 records
28–30 °C: 1 records

Photos

(c) Tim, some rights reserved (CC BY-SA), uploaded by Tim · CC BY-SA · iNaturalist
(c) Tim, some rights reserved (CC BY-SA), uploaded by Tim · CC BY-SA · iNaturalist
(c) Tim, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Tim, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) pimelea, some rights reserved (CC BY) · CC BY · iNaturalist
(c) ttsquid, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Peter Crowcroft, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

Other scientific names: Epitonium granulosum, Granuliscala granosa, Scalaria granulata, Scalaria granulosa, Turritella granosa

Similar species

Austral Wentletrap
Opalia australis
Opalia ballinensis
Opalia bicarinata
Epitonium jukesianum
Lamellose Wentletrap
Gyroscala commutata
Dwarf janthina
Janthina exigua

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).
222 open-data records from 1923 to 2014.
Species data updated November 5, 2026.