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Species · Jellyfish, corals and anemones

Knotted Thread Hydroid

Obelia geniculata

3,848Records since 2000
SeptemberPeak month
32Counties with records

When it is recorded

Jan16
Feb15
Mar56
Apr171
May382
Jun586
Jul721
Aug727
Sep840
Oct218
Nov80
Dec30

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

Where it is recorded

#CountyNationRecordsShare
1Highland Scotland81
2Pembrokeshire Wales49
3Causeway Coast and Glens Northern Ireland39
4Argyll and Bute Scotland36
5Na h-Eileanan Siar Scotland22
6Torbay England22
7Cornwall England21
8Devon England21
9Ards and North Down Northern Ireland21
10Dorset England18
11Aberdeenshire Scotland14
12Scottish Borders Scotland14
13Gwynedd Wales11
14Shetland Islands —11
15Orkney Islands Scotland11
1,536 England1,275 Scotland402 Wales347 Northern Ireland

Records per county (GADM level 2) and per nation; one record can count towards several areas. 32 counties in all.

About this species

Records since 2000
3,848
Peak month
September
Counties with records
32
Scientific name
Obelia geniculata
Group
Jellyfish, corals and anemones
NBN Atlas records since 2000
4,262
Most recorded in
Highland
Kingdom
Animalia
Phylum
Cnidaria
Class
Hydrozoa
Order
Leptothecata
Family
Campanulariidae
Genus
Obelia
Name with authority
Obelia geniculata (Linnaeus, 1758)
Described
1758
Contributing datasets
42

Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · Wikidata Q2193857 · GBIF 2268160