Pachygrapsus
Pachygrapsus is a genus of crabs in the family Grapsidae, commonly known as “shore crabs” or “rock crabs“. They are found in intertidal zones, typically on rocky shores, and are known for their ability to live both on land and in the water. They are a diverse group with several species distributed across the globe, including the Pacific coast of North America, the Atlantic coast of North America, the Mediterranean Sea, and the coast of South Africa.
Characteristics
Pachygrapsus crabs are typically characterized by their broad, flattened carapace, which can range in color from grey to brown, often with markings or stripes. They have a distinctive "square" shape, with their legs extending laterally from the body. The claws are relatively small and blunt, and their legs are well-adapted for both walking and climbing.
Environment
Pachygrapsus crabs are found in intertidal zones, typically on rocky shores, often near the high tide mark. They can tolerate both marine and terrestrial environments, and are often found in crevices and under rocks during low tide, emerging to feed at high tide. Their diet consists of algae, detritus, and small invertebrates.
Species
There are several species of Pachygrapsus, including:
- Pachygrapsus crassipes (Pacific shore crab)
- Pachygrapsus transversus (Atlantic shore crab)
- Pachygrapsus marmoratus (marbled shore crab)
- Pachygrapsus maurus (black shore crab)
- Pachygrapsus liosus (smooth shore crab)
References
For more information about Pachygrapsus, you can refer to the following resources: