Crater sponge
- Group
- Sponges
- Peak month
- September
- Records since 2000
- 6,234
Described in 1874
33 species
Trichobranchus roseus
- Group
- Worms (annelids)
- Peak month
- May
- Records since 2000
- 2,229
Fries’ goby
- Group
- Fish
- Peak month
- October
- Records since 2000
- 1,516
Malmgrenia andreapolis
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 1,016
Scolopostethus thomsoni
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 790
Shadow Stretch Spider
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 550
Orthocladius van-der
- Group
- True flies
- Peak month
- May
- Records since 2000
- 530
Lanassa venusta
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 499
Lacydonia miranda
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 403
Phyllonorycter geniculella
- Group
- Butterflies and moths
- Peak month
- October
- Records since 2000
- 282
Eulalia tripunctata
- Group
- Worms (annelids)
- Peak month
- June
- Records since 2000
- 266
Oulema duftschmidi
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 253
Neogyptis rosea
- Group
- Worms (annelids)
- Peak month
- October
- Records since 2000
- 234
Diminutive Goby
- Group
- Fish
- Peak month
- August
- Records since 2000
- 152
Sabella discifera
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 151
Dicranopalpus larvatus
- Group
- Mites, harvestmen and other arachnids
- Peak month
- December
- Records since 2000
- 132
Nephtys paradoxa
- Group
- Worms (annelids)
- Peak month
- January
- Records since 2000
- 130
A hydroid
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 125
Neophilaenus exclamationis
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 123
A water beetle
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 120
Astacilla damnoniensis
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 110
Leocarpus fragilis
- Group
- Microorganisms and protists
- Peak month
- October
- Records since 2000
- 100
Sponge
- Group
- Sponges
- Peak month
- September
- Records since 2000
- 98
Holocentropus stagnalis
- Group
- Caddisflies
- Peak month
- August
- Records since 2000
- 89
Mycale rotalis
- Group
- Sponges
- Peak month
- August
- Records since 2000
- 85
Myrianida brachycephala
- Group
- Worms (annelids)
- Peak month
- July
- Records since 2000
- 83
Xanthocanace ranula
- Group
- True flies
- Peak month
- July
- Records since 2000
- 83
Zygina angusta
- Group
- True bugs
- Peak month
- March
- Records since 2000
- 82
A ribbon worm
- Group
- Other invertebrates
- Peak month
- September
- Records since 2000
- 79
Sphecodes niger
- Group
- Bees, wasps and ants
- Peak month
- August
- Records since 2000
- 78
Orthotylus moncreaffi
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 68
Saldula palustris
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 67
Chrysotus blepharosceles
- Group
- True flies
- Peak month
- June
- Records since 2000
- 58