Inachus
Inachus is a genus of spider crabs belonging to the family Inachidae. They are characterized by their long, spiny legs and distinctive, often colorful, carapaces. These crabs are found in a variety of marine environments, primarily in temperate and tropical waters around the world.
Common Names
Common names for species within the genus Inachus vary depending on location and species, but some common terms include:
- Spider Crab
- Long-legged Crab
- Spiny Crab
Characteristics
Inachus crabs are easily recognized by their:
- Long, slender legs: These legs are often covered in spines and can be much longer than the crab's body.
- Spiny Carapace: The carapace, or shell, is typically covered in a variety of spines and projections that provide camouflage and protection.
- Variable coloration: The coloration of Inachus crabs can vary greatly depending on the species and their environment. Some species are mottled brown or gray, while others have bright red, orange, or yellow markings.
- Size: The size of Inachus crabs can vary depending on the species, but they are generally small to medium-sized.
Environments
Inachus crabs are found in a variety of marine environments, including:
- Rocky reefs: They are often found clinging to rocks, kelp forests, and other hard surfaces.
- Sandy bottoms: Some species can be found on sandy bottoms.
- Estuaries: Certain species can tolerate brackish water and can be found in estuaries.
Diet
Inachus crabs are primarily scavengers and feed on a variety of dead and decaying organic matter, including:
- Dead fish
- Algae
- Seaweed
- Mollusks
- Worms
They may also occasionally prey on small invertebrates.
Reproduction
Inachus crabs reproduce through external fertilization. Females carry their eggs under their abdomen until they hatch. The larvae undergo a series of molts before reaching adulthood.