Metopograpsus
Metopograpsus is a genus of crabs in the family Grapsidae, commonly known as “Shore Crabs.” They are found in the intertidal zone of the Indo-Pacific region, and are known for their distinctive flattened bodies and their ability to climb smooth surfaces.
Common Names
Members of the Metopograpsus genus are commonly referred to as "Shore Crabs," "Shore Grapsids," or "Climbing Crabs." They are also known by specific names in different regions, such as the "Green Shore Crab" (M. messor) and the "Yellow Shore Crab" (M. thukuhar).
Characteristics
Metopograpsus crabs are characterized by their:
- Flattened, oval-shaped bodies with a smooth, slightly convex carapace.
- Prominent, pointed rostral teeth.
- Large, powerful chelae (claws).
- Lateral margins of the carapace with prominent, tooth-like projections.
- Coloration that can vary from brown to green or yellow.
These crabs are adapted to a terrestrial lifestyle and are capable of moving quickly on land, even climbing vertical surfaces.
Environment
Metopograpsus crabs inhabit the intertidal zone of rocky shores and estuaries. They are typically found in areas with exposed rocks, seawalls, and mangroves. They are also known to venture inland for short periods, particularly during low tide or in search of food.
Diet
Metopograpsus crabs are omnivorous and feed on a variety of organisms, including:
- Algae
- Seagrass
- Mollusks
- Insects
- Carrion
Reproduction
Metopograpsus crabs are oviparous, meaning that they lay eggs. Female crabs release their eggs into the water, where they hatch into larvae. The larvae go through several molts before becoming adults.
References