#4698 · 🐌 snails, slugs & other molluscs
Crimson Hermaea
🇳🇱 Slanke rolsprietslak ·Hermaea bifida
🐌 Snails, slugs & other molluscs 📍 in the Netherlands
📍 Den Osse 103, 4318 TP Brouwershaven, Nederland
📍 Bouillante, GP-BT, GP
📍 Watergate Bay, Cornwall, England, GB
📍 Lochailort PH38, UK
10 photos from iNaturalist (Creative Commons) · credits & licences
- 1. © Nathan Jackson · CC BY-NC 4.0
- 2. © Nathan Jackson · CC BY-NC 4.0
- 3. © unorthodox_sketch · CC BY-NC 4.0
- 4. © Xavier Rufray · CC BY-NC 4.0
- 5. © Antoni López-Arenas i Cama · CC BY-NC 4.0
- 6. © Pierre Corbrion · CC BY-NC-SA 4.0
- 7. Den Osse 103, 4318 TP Brouwershaven, Nederland:© Glenn Biscop · CC BY-NC 4.0
- 8. Bouillante, GP-BT, GP:© Julie Mellinger · CC BY-NC 4.0
- 9. Watergate Bay, Cornwall, England, GB:© Sarah-Jane Rose · CC BY-NC 4.0
- 10. Lochailort PH38, UK:© elegaer · CC BY-NC 4.0
what is it?
Hermaea bifida is a species of sacoglossan sea slug, a shell-less marine opisthobranch gastropod mollusk in the family Hermaeidae.
base stats
Bars compare against all animals on log scales: up to 300,000 Dutch and 600,000 worldwide sightings (the most-seen species), 150 t (blue whale), 30 m and 400 years (Greenland shark).
fun facts
- Spotted 14 times in the Netherlands on iNaturalist.
- 124 observations worldwide on iNaturalist.
- Scientifically named by George Montagu in 1815 (211 years ago).
fact sheet
- English
- Crimson Hermaea
- Nederlands
- Slanke rolsprietslak
- scientific name
- Hermaea bifida
- class
- Gastropoda
- family
- Hermaeidae
- sightings in NL
- 14
- sightings in Europe
- 95
- sightings worldwide
- 124
- GBIF records in NL
- 94
- weight
- —
- length
- —
- lifespan
- —
- named
- 1815 by George Montagu
Sources: iNaturalist taxon 482689, Wikidata Q3199460, GBIF 2298938, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.