Nature Field Guide
American Pebble Crab
- Spanish name
- Cangrejo piedra americano
- Scientific name
- Daira americana
What Do Pico & Tati Think?
A crab can blend into a rocky neighborhood. Pico watches patiently while Tati compares the outline with the stones around it.
Species overview
About the American Pebble Crab
Daira americana is a small shore crab associated with rocky lower tidal habitat. Its compact, textured appearance makes it an interesting animal to compare with smooth-looking crabs. It belongs to the family Dairidae. Finding a crab shelter is a reason to leave the shelter undisturbed.
Identification
Key Features of the American Pebble Crab
A compact crab body
A textured carapace
Confirm the identification from a detailed photograph
Habitat & range
Rocky shore and naturally visible tidal habitat. Choose a permitted observation point with an adult; do not turn rocks or reach into holes.
Local observations
Documented in Guanacaste. Region tags represent documented locations, not an exhaustive range or a promise of occurrence at every beach. Additional regional assignments require locality evidence.
When to observe
Visibility depends on the site, conditions and the animal. Ask a local guide about an appropriate visit; no fixed encounter season is promised.
Conservation & care
Give claws and burrow entrances space. Do not handle, feed, chase or collect crabs. Leave rocks and shells where they are, and follow your adult’s route and local signs.
Observation activity
Draw the surrounding stones and the visible crab. Ask which shapes help it become less noticeable.