Chela

A chela, derived from the Greek word for 'claw,' is a pincer-like appendage found on the end of some limbs, particularly in arthropods like crabs, lobsters, scorpions, and some insects. These specialized claws are used for grasping, holding, and manipulating objects, providing a crucial tool for defense, feeding, and mating. The chela's structure can vary significantly depending on its function, with some chelae being designed for crushing while others are adapted for delicate manipulation. Understanding the chela's role is crucial for understanding the behaviors and ecologies of chelate-bearing organisms.

Chela meaning with examples

• The hermit crab cautiously extended its chela to examine a piece of driftwood. The pincer, equipped with sharp edges, delicately felt the texture. Using this chela, the crab brought the wood closer, seeking a new home. Its other chela was guarding its entrance, ready for any attack. Its ability to manipulate objects using these chelae is why these crustaceans can thrive in many settings.
• The mantis shrimp is notorious for its incredibly powerful chelae. These are called 'spear chelae' and are used to stun or kill prey. The power of these chelae can be tremendous for their small size! This mantis shrimp uses its other chelae to pick up its food or to fend off any intruders to its territory. Its ability to strike with such force is awe-inspiring.
• The horseshoe crab's chelae are small and used to grasp the sea floor and to feed. Its small chelae delicately search the sandy bottom for food items. These are not the big crushing chelae that many other arthropods have. The other chelae are used for moving. They are used to hold the prey or scrape food items from the surface.
• The fiddler crab uses its oversized chela for display and to fight off other crabs during mating season. The male fiddler crab uses this huge chela to attract females by waving it in the air. The other chela can be small or non-existent. These chelae are adapted for visual signaling and courtship.
• The scorpion's large chelae are used for seizing and holding prey. It injects venom to immobilize its food. The other chelae are adapted for walking and other things. These large chelae are crucial for the scorpion's survival and hunting strategy. Its grasping ability comes down to the usage of the claws.