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Emerita analoga (Stimpson, ). Common name(s): Pacific sand crab, sand crab, mole crab. Synonyms: Hippa analoga, 3 cm preserved female. Scientific Name. Emerita analoga. Animal Type. Invertebrates. Diet. plankton, mostly dinoflagellates. Size. females: to 2 inches ( mm); males inches. Pacific Sand Crab (Mole Crab). Emerita analoga. Decapoda: Hippidae. Laguna Beach, Orange County, CA. 06/11/ © Peter J. Bryant. Back to Natural History.

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After the wave retreats, the antennae are quickly coiled and retracted into the body. The sand crabs with soft shells that have just moulted are kept for bait, while the hard-shelled crabs are thrown back into the sea. Click Here for a movie of a 1. This analogw the only local species of Emerita.

Retrieved from ” https: Algal blooms, which will be covered in a future Get to Know Your Neighbor Segmentare linked with the znaloga of fertilizers used by humans. The main predators of Emerita are fish; in the eastern Pacific Ocean, the barred surfperch Amphistichus argenteus is particularly important. Its legs and uropods have hairy margins for rapid digging in the sand, for filtering food and transferring it to the mouth.

Week # 5: Pacific Sand Crab, Emerita analoga

The carapace has three teeth in front and is smooth except for small, transverse ridges on the anterior portion. In some cultures, sand crabs are eaten as a popular snack, such as in Thailand and parts of India. Laboratories use sand crabs in neurological studies because the crabs’ tails have the largest sensory neurons found in any animal. Most individual species, however, are restricted to smaller areas, and their ranges rarely overlap.


Hippa analoga Stimpson, A female may produce as many as 45, eggs. It is found on exposed sandy beaches in the swash region of the intertidal zone.

Emerita analoga – Wikipedia

When a wave sweeps in, the animal pops up and rides the wave for a few feet; then emeritw quickly burrows rear-first into the sand using its abdomen movie. Emerita analoga Stimpson, Common name s: Locations, abundances, unusual behaviors: Emerita analogathe Pacific sand crab or Pacific mole crabis a species of small, sand-burrowing decapod crustacean found living in the sand along the temperate western coasts of North and South America.

These small animals burrow in the sand in the swash zone and use their antennae for filter feeding. As a receding wave flows over them, the sand crabs uncoil a second pair of featherlike antennae and sweep them through the water to filter out tiny plankton.

I am quick to burrow to evade birds Sandpipers, scooters and plovers and fish surfperch, corbina and small […] Share this: To e,erita put in enerita sand, a crab burrows quickly and often.

I am most frequently found on tidal sandy stretches of warm and sunny summertime beaches. Retrieved from ” https: The sea otter also consumes them.

Other birds that eat sand crabs include willetsgodwitssurf scotersblackbellied ploversand curlews. The qnaloga crab has been evaluated as an indicator species for monitoring the level of domoic acid -synthesizing diatoms Pseudo-nitzschia spp.


Sand crab, Beaches & Dunes, Invertebrates, Emerita analoga at the Monterey Bay Aquarium

In other projects Wikimedia Commons. It has five pairs of legs and three pairs of pleopods.

The species primarily inhabits beaches with clean, pebble and stone-free sand. I found many juveniles on the beach at Kalaloch, most less than 1 cm total length. Introductio ad historiam naturalem sistens genera lapidum, plantarum, et animalium hactenus detecta, caracteribus essentialibus donata, in tribus divisa, subinde ad leges naturae in Latin.

No bigger than a thumb, a sand crab spends most of its time buried in shifting sand. Males are typically smaller than females, and in some species, such as Emerita rathbunaethe minute males live attached to the legs of the female.

As my name suggests, Sand Crabs, prefer open sandy areas where we are free to move with the ebb and flow of tides. Domoic acid—a naturally occurring toxin produced by microscopic algae—causes serious amnesic poisoning in higher animals, including humans.

The left view shows the normal position of the abdomen and telson.

Emerita analoga

Bulletin of Zoological Nomenclature. It can do this several times per wave.

The genus as a whole has a broad distribution in tropical and subtropical regions. Note that the normal color has faded since this is a preserved specimen.