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Species · Crustaceans

Acorn Barnacle

Semibalanus balanoides

7,241Records since 2000
AugustPeak month
47Counties with records

When it is recorded

Jan77
Feb283
Mar177
Apr396
May815
Jun1,141
Jul915
Aug1,400
Sep1,013
Oct476
Nov174
Dec162

GBIF records by month, 2000–2025 (all years combined).

Where it is recorded

#CountyNationRecordsShare
1Pembrokeshire Wales563
2Highland Scotland473
3Gwynedd Wales449
4Argyll and Bute Scotland248
5Na h-Eileanan Siar Scotland197
6North Yorkshire England153
7Devon England138
8Cornwall England129
9Scottish Borders Scotland123
10Torbay England119
11East Riding of Yorkshire England107
12Ards and North Down Northern Ireland89
13Portsmouth England85
14Fife Scotland78
15Ceredigion Wales77
2,184 England2,167 Scotland2,162 Wales404 Northern Ireland

Records per county (GADM level 2) and per nation; one record can count towards several areas. 47 counties in all.

About this species

Records since 2000
7,241
Peak month
August
Counties with records
47
Scientific name
Semibalanus balanoides
Group
Crustaceans
NBN Atlas records since 2000
7,062
Kingdom
Animalia
Phylum
Arthropoda
Class
Maxillopoda
Order
Sessilia
Family
Archaeobalanidae
Genus
Semibalanus
Name with authority
Semibalanus balanoides (Linnaeus, 1767)
Described
1767
Contributing datasets
60

Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · Wikidata Q340084 · GBIF 2115784