- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 1,804
- Group
- Worms (annelids)
- Peak month
- May
- Records since 2000
- 1,346
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 830
- Group
- Molluscs
- Peak month
- July
- Records since 2000
- 514
- Group
- Caddisflies
- Peak month
- June
- Records since 2000
- 305
- Group
- Worms (annelids)
- Peak month
- April
- Records since 2000
- 276
- Group
- Crustaceans
- Peak month
- April
- Records since 2000
- 258
- Group
- Roundworms
- Peak month
- May
- Records since 2000
- 111
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 82
- Group
- True flies
- Peak month
- July
- Records since 2000
- 60
- Group
- True flies
- Peak month
- June
- Records since 2000
- 55