Species Detail - Sea Oak (Halidrys siliquosa) - Species information displayed is based on all datasets.

Terrestrial Map - 10km

Distribution of the number of records recorded within each 10km grid square (ITM).
Live Map

Marine Map - 50km

Distribution of the number of records recorded within each 50km grid square (WGS84).
Live Map
Halidrys siliquosa
Sea Oak
NHMSYS0021058664 RecommendedWell-formed
N/A
hasil
(Linnaeus) Lyngbye, 1819
Chromist
Species
902
178
64
01/01/1891
06/09/2025
1 January (recorded in 1985)
31 December (recorded in 1898)
National Biodiversity Data Centre, Ireland, Sea Oak (Halidrys siliquosa), accessed 21 February 2026, https://maps.biodiversityireland.ie/Species/291195

Records per month (across all datasets)

Records per year (across all datasets)