Brachysira brebissonii
- Peak month
- September
- Records since 2000
- 216
- Group
- Seaweeds and algae
Coscinodiscus wailesii
- Peak month
- May
- Records since 2000
- 215
- Group
- Seaweeds and algae
Reimeria uniseriata
- Peak month
- September
- Records since 2000
- 215
- Group
- Seaweeds and algae
Nitzschia gracilis
- Peak month
- September
- Records since 2000
- 214
- Group
- Seaweeds and algae
Foxtail stonewort
- Peak month
- July
- Records since 2000
- 211
- Scientific name
- Lamprothamnium papulosum
Navicula angusta
- Peak month
- September
- Records since 2000
- 211
- Group
- Seaweeds and algae
Melanothamnus harveyi
- Peak month
- July
- Records since 2000
- 210
- Group
- Seaweeds and algae
Gomphonema gracile
- Peak month
- October
- Records since 2000
- 207
- Group
- Seaweeds and algae
Asperococcus fistulosus
- Peak month
- June
- Records since 2000
- 205
- Group
- Seaweeds and algae
Prasiola stipitata
- Peak month
- August
- Records since 2000
- 205
- Group
- Seaweeds and algae
Zygoceros rhombus
- Peak month
- May
- Records since 2000
- 202
- Group
- Seaweeds and algae
Proboscia inermis
- Peak month
- May
- Records since 2000
- 201
- Group
- Seaweeds and algae
Ectocarpus siliculosus
- Peak month
- June
- Records since 2000
- 197
- Group
- Seaweeds and algae
Rhizosolenia robusta
- Peak month
- April
- Records since 2000
- 197
- Group
- Seaweeds and algae
Spyridia filamentosa
- Peak month
- September
- Records since 2000
- 195
- Group
- Seaweeds and algae
Fragilaria pararumpens
- Peak month
- September
- Records since 2000
- 193
- Group
- Seaweeds and algae
Spongonema tomentosum
- Peak month
- June
- Records since 2000
- 193
- Group
- Seaweeds and algae
Denticula tenuis
- Peak month
- September
- Records since 2000
- 192
- Group
- Seaweeds and algae
Rhizosolenia indica
- Peak month
- May
- Records since 2000
- 192
- Group
- Seaweeds and algae
Navicula radiosa
- Peak month
- September
- Records since 2000
- 189
- Group
- Seaweeds and algae
Fragilaria recapitellata
- Peak month
- April
- Records since 2000
- 187
- Group
- Seaweeds and algae
Phymatolithon lenormandii
- Peak month
- September
- Records since 2000
- 187
- Group
- Seaweeds and algae
Lomentaria orcadensis
- Peak month
- June
- Records since 2000
- 185
- Group
- Seaweeds and algae
Neopyropia spec
- Peak month
- May
- Records since 2000
- 183
- Group
- Seaweeds and algae
Ceramium echionotum
- Peak month
- May
- Records since 2000
- 179
- Group
- Seaweeds and algae
Tabularia fasciculata
- Peak month
- September
- Records since 2000
- 179
- Group
- Seaweeds and algae
Nitzschia lacuum
- Peak month
- September
- Records since 2000
- 175
- Group
- Seaweeds and algae
Netrium digitus
- Peak month
- July
- Records since 2000
- 174
- Group
- Seaweeds and algae
Sellaphora pupula
- Peak month
- September
- Records since 2000
- 174
- Group
- Seaweeds and algae
Navicula membranacea
- Peak month
- May
- Records since 2000
- 173
- Group
- Seaweeds and algae
Fallacia subhamulata
- Peak month
- September
- Records since 2000
- 171
- Group
- Seaweeds and algae
Helicotheca tamesis
- Peak month
- May
- Records since 2000
- 171
- Group
- Seaweeds and algae
Achnanthidium caledonicum
- Peak month
- May
- Records since 2000
- 169
- Group
- Seaweeds and algae
Frustulia saxonica
- Peak month
- September
- Records since 2000
- 169
- Group
- Seaweeds and algae
Gomphonema spec
- Peak month
- September
- Records since 2000
- 169
- Group
- Seaweeds and algae
Chondracanthus acicularis
- Peak month
- September
- Records since 2000
- 168
- Group
- Seaweeds and algae
Choricystis parasitica
- Peak month
- January
- Records since 2000
- 166
- Group
- Seaweeds and algae
Fragilaria rumpens
- Peak month
- May
- Records since 2000
- 163
- Group
- Seaweeds and algae
Gelidium pulchellum
- Peak month
- April
- Records since 2000
- 161
- Group
- Seaweeds and algae
Blidingia minima
- Peak month
- September
- Records since 2000
- 160
- Group
- Seaweeds and algae
Bryopsis hypnoides
- Peak month
- August
- Records since 2000
- 158
- Group
- Seaweeds and algae
Navicula tenelloides
- Peak month
- October
- Records since 2000
- 158
- Group
- Seaweeds and algae
Cladophora albida
- Peak month
- September
- Records since 2000
- 157
- Group
- Seaweeds and algae
Gomphonema clavatum
- Peak month
- April
- Records since 2000
- 154
- Group
- Seaweeds and algae
Thalassiothrix longissima
- Peak month
- October
- Records since 2000
- 152
- Group
- Seaweeds and algae
Antithamnionella ternifolia
- Peak month
- September
- Records since 2000
- 151
- Group
- Seaweeds and algae
Porphyra linearis
- Peak month
- March
- Records since 2000
- 150
- Group
- Seaweeds and algae
Rhizoclonium riparium
- Peak month
- September
- Records since 2000
- 150
- Group
- Seaweeds and algae