#2059 · 🦈 sharks & rays
Thornback Guitarfish
🇳🇱 Stekelrugwaaierrog ·Platyrhinoidis triseriata
📍 Monterey County, CA, USA
📍 Castroville, CA 95012, USA
📍 Bolsa Chica Ecological Reserve, Huntington Beach, CA, US
📍 Naval Base Point Loma, San Diego, CA, US
10 photos from iNaturalist (Creative Commons) · credits & licences
- 1. © Steven Sennikoff · CC BY-NC 4.0
- 2. © uzun · CC BY-NC 4.0
- 3. © Ken-ichi Ueda · CC BY 4.0
- 4. © Christian Schwarz · CC BY-NC 4.0
- 5. © Christian Schwarz · CC BY-NC 4.0
- 6. © Michael Bear · CC BY 4.0
- 7. Monterey County, CA, USA:© Donna Pomeroy · CC BY-NC 4.0
- 8. Castroville, CA 95012, USA:© Destiny Henderson-Hudgins · CC BY-NC 4.0
- 9. Bolsa Chica Ecological Reserve, Huntington Beach, CA, US:© aaronminnicucci · CC BY-NC 4.0
- 10. Naval Base Point Loma, San Diego, CA, US:© postletawet · CC BY-NC 4.0
what is it?
The thornback guitarfish ( Platyrhinoidis triseriata ) is a species of ray in the family Platyrhinidae, and the only member of its genus. Despite its name and appearance, it is more closely related to stingrays than to true guitarfishes of the family Rhinobatidae. This species ranges from Tomales Bay to the Gulf of California, generally in inshore waters no deeper than 6 m (20 ft). It can be found on or buried in sand or mud, or in and near...
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
- No confirmed wild sightings in the Netherlands on iNaturalist: you'd have to travel for this one.
- 1,201 observations worldwide on iNaturalist.
- Scientifically named by Charles Henry Gilbert in 1880 (146 years ago).
fact sheet
- English
- Thornback Guitarfish
- Nederlands
- Stekelrugwaaierrog
- scientific name
- Platyrhinoidis triseriata
- class
- Chondrichthyes
- order
- Torpediniformes
- family
- Platyrhinidae
- IUCN Red List
- LC · least concern
- sightings in NL
- 0
- sightings worldwide
- 1,201
- GBIF records in NL
- 0
- weight
- —
- length
- —
- lifespan
- —
- named
- 1880 by Charles Henry Gilbert
IUCN in Dutch: niet bedreigd. Blank means the sources don't say.
Sources: iNaturalist taxon 48401, Wikidata Q137755, GBIF 2418958, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.