Bonnemaisonia asparagoides
- Peak month
- August
- Records since 2000
- 633
- Group
- Seaweeds and algae
Rhodophyllis divaricata
- Peak month
- September
- Records since 2000
- 630
- Group
- Seaweeds and algae
Amphora atomus
- Peak month
- September
- Records since 2000
- 626
- Group
- Seaweeds and algae
Sea Cauliflower
- Peak month
- June
- Records since 2000
- 607
- Scientific name
- Leathesia marina
Gelidium pusillum
- Peak month
- September
- Records since 2000
- 602
- Group
- Seaweeds and algae
Landlady's Wig
- Peak month
- September
- Records since 2000
- 590
- Scientific name
- Ahnfeltia plicata
Chaetomorpha ligustica
- Peak month
- May
- Records since 2000
- 589
- Group
- Seaweeds and algae
Horned Wrack
- Peak month
- October
- Records since 2000
- 585
- Scientific name
- Fucus ceranoides
Siphoned Japan Weed
- Peak month
- September
- Records since 2000
- 570
- Scientific name
- Dasysiphonia japonica
Graceful green hair
- Peak month
- April
- Records since 2000
- 568
- Scientific name
- Cladophora sericea
Encyonema gracile
- Peak month
- September
- Records since 2000
- 548
- Group
- Seaweeds and algae
Rhizosolenia fragillissima
- Peak month
- June
- Records since 2000
- 547
- Group
- Seaweeds and algae
Purple Laver
- Peak month
- October
- Records since 2000
- 535
- Scientific name
- Porphyra purpurea
Rhodomela confervoides
- Peak month
- June
- Records since 2000
- 528
- Group
- Seaweeds and algae
Lomentaria clavellosa
- Peak month
- May
- Records since 2000
- 522
- Group
- Seaweeds and algae
Bonnemaison's Hook Weed
- Peak month
- August
- Records since 2000
- 521
- Scientific name
- Bonnemaisonia hamifera
Lauderia mediterranea
- Peak month
- September
- Records since 2000
- 518
- Group
- Seaweeds and algae
Beanweed
- Peak month
- May
- Records since 2000
- 517
- Scientific name
- Scytosiphon lomentaria
Halopteris filicina
- Peak month
- August
- Records since 2000
- 508
- Group
- Seaweeds and algae
Navicula subminuscula
- Peak month
- September
- Records since 2000
- 508
- Group
- Seaweeds and algae
Acrosorium ciliolatum
- Peak month
- August
- Records since 2000
- 492
- Group
- Seaweeds and algae
Gomphonema calcifugum
- Peak month
- May
- Records since 2000
- 489
- Group
- Seaweeds and algae
Cyclotella meneghiniana
- Peak month
- September
- Records since 2000
- 483
- Group
- Seaweeds and algae
Navicula permitis
- Peak month
- April
- Records since 2000
- 476
- Group
- Seaweeds and algae
Nitzschia amphibia
- Peak month
- September
- Records since 2000
- 473
- Group
- Seaweeds and algae
Nitzschia recta
- Peak month
- September
- Records since 2000
- 473
- Group
- Seaweeds and algae
Cerataulina bergonii
- Peak month
- June
- Records since 2000
- 470
- Group
- Seaweeds and algae
Eucampia zodiacus
- Peak month
- September
- Records since 2000
- 467
- Group
- Seaweeds and algae
Doubled Ribbon Weed
- Peak month
- August
- Records since 2000
- 460
- Scientific name
- Ulva linza
Schottera nicaeensis
- Peak month
- May
- Records since 2000
- 458
- Group
- Seaweeds and algae
Navicula reichardtiana
- Peak month
- September
- Records since 2000
- 457
- Group
- Seaweeds and algae
Navicula rhynchocephala
- Peak month
- September
- Records since 2000
- 456
- Group
- Seaweeds and algae
Nitzschia linearis
- Peak month
- September
- Records since 2000
- 456
- Group
- Seaweeds and algae
Nitzschia capitellata
- Peak month
- September
- Records since 2000
- 448
- Group
- Seaweeds and algae
Nitophyllum punctatum
- Peak month
- July
- Records since 2000
- 445
- Group
- Seaweeds and algae
Chara vulgaris
- Peak month
- June
- Records since 2000
- 442
- Group
- Seaweeds and algae
Navicula capitatoradiata
- Peak month
- September
- Records since 2000
- 437
- Group
- Seaweeds and algae
Erythroglossum laciniatum
- Peak month
- August
- Records since 2000
- 436
- Group
- Seaweeds and algae
Lemanea fluviatilis
- Peak month
- July
- Records since 2000
- 432
- Group
- Seaweeds and algae
Fragilaria bidens
- Peak month
- September
- Records since 2000
- 427
- Group
- Seaweeds and algae
Lithothamnion glaciale
- Peak month
- April
- Records since 2000
- 425
- Group
- Seaweeds and algae
Gongolaria baccata
- Peak month
- January
- Records since 2000
- 424
- Group
- Seaweeds and algae
Synedra radians
- Peak month
- September
- Records since 2000
- 424
- Group
- Seaweeds and algae
Pinnularia subcapitata
- Peak month
- May
- Records since 2000
- 419
- Group
- Seaweeds and algae
Gomphonema angustatum
- Peak month
- April
- Records since 2000
- 418
- Group
- Seaweeds and algae
Asterionella kariana
- Peak month
- April
- Records since 2000
- 415
- Group
- Seaweeds and algae
Grateloupia turuturu
- Peak month
- August
- Records since 2000
- 415
- Group
- Seaweeds and algae
Brachysira neoexilis
- Peak month
- September
- Records since 2000
- 414
- Group
- Seaweeds and algae