Chromista › Sargassum and Allies
Sea-oak
Halidrys siliquosa
25 photos
Study shows up to four per card, from different observers, so you learn the species rather than one picture. Heart the good ones and swap any you do not like.
Photos you add are credited to you, and you keep the copyright.
Easily confused with
Knotted WrackAscophyllum nodosum
ThongweedHimanthalia elongata
Japanese WireweedSargassum muticum
bladder wrackFucus vesiculosus
brown tuning-fork weedBifurcaria bifurcata
Study checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| United States | 14,782 |
|---|---|
| Alaska | 14,779 |
| United Kingdom | 106 |
| England | 40 |
| Northern Ireland | 30 |
| Scotland | 27 |
| Denmark | 27 |
| Spain | 23 |
| Midtjylland | 14 |
| France | 12 |
Counts show where people looked, not only where it lives.
Classification
| Kingdom | kelp, diatoms, and allies · Chromista |
|---|---|
| Phylum | Ochrophyta |
| Class | brown algae · Phaeophyceae |
| Order | Fucoids · Fucales |
| Family | Sargassum and Allies · Sargassaceae |
| Genus | Halidrys |
Sources
- Names, taxonomy and observation counts: www.inaturalist.org
- Photos and recordings: the creator and source are on each one.
- How much to rely on each source
Remember the name next time.
Practise Sea-oak with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.