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Padre Island National SeashoreHatchlings are about two inches in length, more or less, depending on their species.
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Padre Island National Seashore
Crustaceans
Ghost Crab

Photo by Tracy Parris

Ghost crabs are nocturnal but can often be seen at dusk or occasionally during the day, particularly when the weather is cloudy.

As you walk over the dunes towards the beach or sit at your picnic table eating lunch, you may catch a glimpse of a ghost crab scuttling across the sand or peering out of its cool, shaded burrow. While they are one of the most commonly seen crustaceans at Padre Island National Seashore, they are just one of 41 crustacean species that have been documented in the park. Crustaceans include such familiar animals as crabs, crayfish, lobsters, shrimp, and barnacles. Most species are aquatic, living in either fresh or salt water habitats, but some have adapted to life on land.

Though crustaceans are oftentimes small creatures, remember that they are valued residents to the unique and fragile ecosystems in which they live. Some burrow into the mud of marshes, creating a complex maze of tunnels that aerate the marsh grasses and underwater seagrass meadows. Many species eat dead or decomposing plant and animal matter, providing healthy soils for new plant growth. Certain crustaceans are also indicators to scientists for signs of pollution and other types of ecosystem damage. Economically, certain species such as lobsters, crab, and shrimp, have sustained cultures and commercial fishing-based communities for generations.

Click on any of the links below to learn more about the specific crustaceans that call the National Seashore.

 
Atlantic Ghost Crab/Sand Crab (Ocypode quadrata)

Atlantic Sand Crab (Emerita talpoida)

Puerto Rican Sand Crab/Mole Crab (Emerita portoricensis)

Sargassum Swimming Crab (Portunus sayi)

Arenaeus cribrarius - Speckled Swimming Crab
Calappa sulcata - Yellow Box Crab
Caliannassa islagrande - Unknown
Caliannassa jamaicense - Ghost Shrimp
Caliannassa major - Unknown
Callinectes sapidus - Blue Crab
Cardiosoma guahumi - Unknown
Clibanarius vittatus - Thinstripe Hermit / Striped Hermit Crab (Regional)
 

Eurypanopeus depressus - Flatback Mud Crab
Gecarcinus lateralis - Blackback Land Crab
Hepatus epheliticus - Calico Box Crab / Shamefaced Crab
Hepatus pudibundus - Flecked Box Crab
Hippolyte pleuracantha - False Zostera Shrimp
Isocheles wurdemanni - Surf Hermit
Libinia dubia - Longnose Spider Crab / Decorator Crab (Regional)
Libinia emarginata - Portly Spider Crab
Menippe mercenaria - Florida Stone Crab
mysids - Unknown
Neopanope texana - Mud Crab (Regional)
Ovalipes guadulpensis - Florida Lady Crab
Pagarus pollicaris - Unknown
Pagurus longicarpus - Long-Armed Hermit Crab / Longwrist Hermit
Paleomonetes intermedius - Unknown
Panopeus herbstii - Atlantic Mud Crab
Parthenope serrata - Sawtooth Elbow Crab
Penaeus aztecus - Northern Brown Shrimp / Brown Shrimp
Persephona aquilonaris - Purse Crab (Regional)
Petrochirus diogenes - Giant Hermit / Red Hermit Crab (Regional)
Porcellana sayana - Spotted Porcelain Crab
Portunus gibbesii - Iridescent Swimming Crab
Portunus sayi - Sargassum Swimming Crab
Portunus spinimanus - Blotched Swimming Crab
Rithropanopeus harrisii - Mud Crab
Stomatopoda - Mantis Shrimp
Tozeuma carolinensis - Unknown
Uca rapax - Mudflat Fiddler Crab
Uca spinicarpa - Spined Fiddler Crab
Uca subcylindrica - Laguna Madre Fiddler Crab

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Last Updated: August 02, 2009 at 17:50 EST