Other animals › Rock Crabs
Pacific Rock Crab
Romaleon antennarium
28 photos
Study shows up to four per card, from different observers, so you learn the species rather than one picture. Heart the good ones and swap any you do not like.
Photos you add are credited to you, and you keep the copyright.
Easily confused with
Red Rock CrabCancer productus
Yellow Rock CrabMetacarcinus anthonyi
Dungeness CrabMetacarcinus magister
Pygmy Rock CrabGlebocarcinus oregonensis
Purple Shore CrabHemigrapsus nudus
Graceful Rock CrabMetacarcinus gracilis
Striped Shore CrabPachygrapsus crassipes
Nine-tooth Pebble CrabCycloxanthops novemdentatus
Study checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| California | 8,304 |
|---|---|
| United States | 5,727 |
| Oregon | 852 |
| Canada | 151 |
| British Columbia | 151 |
| Washington | 143 |
| Mexico | 7 |
| Baja California | 7 |
Counts show where people looked, not only where it lives.
Traits
Physical
- ExoskeletonHas a hard external skeletonFrom its classification
Classification
| Kingdom | Animals · Animalia |
|---|---|
| Phylum | Arthropods · Arthropoda |
| Class | Malacostracans · Malacostraca |
| Order | Decapods · Decapoda |
| Family | Rock Crabs · Cancridae |
| Genus | Romaleon |
Sources
- Names, taxonomy and observation counts: www.inaturalist.org
- Photos and recordings: the creator and source are on each one.
- How much to rely on each source
Remember the name next time.
Practise Pacific Rock Crab with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.