Atlantic Mole Crab
Emerita talpoida
The Atlantic Mole Crab is a small oval crustacean that burrows backward into wet beach sand and filters food from each receding wave.
Atlantic Mole Crabs live in the swash zone where waves wash across sloping sand. Their smooth compact bodies let them disappear below the surface within seconds.
They extend feathery antennae into moving water to strain plankton and organic particles. Shorebirds, pompano, red drum, and other coastal predators depend on them as food.
Habitat:
Beaches and Dunes, Coastal Waters
Area / Range:
Atlantic Coast, Gulf Coast
Diet:
It filters microscopic plankton, algae, detritus, and suspended organic particles from breaking waves.
Behavior:
It rides the swash, burrows tail-first as water recedes, and shifts up or down the beach with changing tides and waves.
Day, Night
Active Times:
Best time to see:
At low to mid tide where waves leave smooth wet sand. Watch for V-shaped marks and rapid burrowing.
Florida Native Status:
Native
Conservation Status:
Common on suitable sandy beaches. Beach nourishment, heavy traffic, erosion, and pollution can reduce local abundance.
Safety Level:
Low Risk
Safety Information:
Mole Crabs do not bite or sting. Return any handled animal gently to wet sand in the swash zone.
Benefits to Property:
They recycle organic material, aerate wet sand, and provide essential food for surf fish and shorebirds.
Property Concerns:
They cause no property damage. Repeated digging, vehicles, and compacted sand can disturb the narrow habitat they need.
Fun Fact:
A Mole Crab digs backward and can vanish under wet sand before the next wave arrives.
Wildlife Laws:
Collection for bait is subject to current fishing and protected-area rules. Some parks and preserves prohibit removal of beach animals.
Identification:
The body is oval, rounded, and pale gray, tan, or cream. The legs tuck beneath the shell, the abdomen is folded under, and long feathery antennae appear when the animal filter-feeds.
Credits:
Facts: GTM Research Reserve Arthropod Guide. Images: primary and secondary.