#4696 · 🐌 snails, slugs & other molluscs
Bushy-backed Nudibranch
🇳🇱 Boompjesslak ·Dendronotus frondosus
🐌 Snails, slugs & other molluscs 📍 in the Netherlands
7 photos from iNaturalist (Creative Commons) · credits & licences
what is it?
Dendronotus frondosus , sometimes known by the common name frond eolis or bushy backed nudibranch , is a species of sea slug, specifically a dendronotid nudibranch, a marine gastropod mollusc in the family Dendronotidae.
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.
- 1,586 observations worldwide on iNaturalist.
- Scientifically named by Peter Ascanius in 1774 (252 years ago).
fact sheet
- English
- Bushy-backed Nudibranch
- Nederlands
- Boompjesslak
- scientific name
- Dendronotus frondosus
- class
- Gastropoda
- order
- Nudibranchia
- family
- Dendronotidae
- sightings in NL
- 14
- sightings in Europe
- 338
- sightings worldwide
- 1,586
- GBIF records in NL
- 120
- weight
- —
- length
- —
- lifespan
- —
- named
- 1774 by Peter Ascanius
relatives· Dendronotidae
Sources: iNaturalist taxon 423919, Wikidata Q226948, GBIF 2292071, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.