EMERITA ANALOGA PDF

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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Photo by Jon Sullivan. Since sand crabs live in sand—the area of the ocean most often contaminated by toxins—they play an important role in the beach ecosystem.

The abdomen and telson are used for rapid digging into the sand as each wave begins to recede. The eggs hatch in about four weeks.

Emerita analoga

As the wave retreats it extends its long, feathery antennae and captures plankton and detritus from the retreating wave. How to Distinguish from Similar Species: This movement happens very quickly, allowing the crabs to gather food several times in one receding wave.

Views Read Edit View history. Sand crabs moult periodically, so its exoskeleton may be found washed up on the beach. They are often prepared via shallow frying in a pan or deep frying in batter. To feed, the crabs burrow backward into the sand and face seaward, with only their eyes and first antennae showing. The species is a motile filter-feeder which inhabits the upper surf swash zone on sandy beaches.

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The zoeal stages last up to days. Journal of Plankton Research.

Week # 5: Pacific Sand Crab, Emerita analoga

Emerita is adept at burrowing, and is capable of burying itself completely in 1. The left view shows the normal position of the abdomen and telson.

Females tend to be found far down the beach, whereas males and immature crabs are found at higher levels. Archived from the original PDF on The first 4 pereopods are flattened, not chelateand used for digging.

Emerita (genus) – Wikipedia

On the right, the telson is held out to reveal the eggs held on the pleopods. Total animal length is 4. Views Read Abaloga View history. I found many juveniles on the beach at Kalaloch, most less than 1 cm total length. The underside is nearly white.

The sand crab always moves backwards when burrowing or crawling. As my name suggests, Sand Crabs, prefer open sandy areas where we are free to move with the ebb and flow analkga tides. Soft-shelled Emerita are kept also as bait by commercial fisheries.

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Pacific Sand Crab (Emerita analoga) ·

It has five pairs of legs and three pairs of pleopods. Commercial bait fisheries keep sand crabs that are in the soft-shelled stage, which occurs after a crab molts its old shell enerita before its new shell hardens.

Emerita analoga Stimpson, Common name s: Retrieved from ” https: The adults reproduce in both their first and second summers and most die in the autumn of their second year. 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.

Natural History of Orange County, California. Note the lack of pleopods on the abdomen. Because the fisheries throw back hard-shelled crabs, sand crab populations haven’t been affected by bait fishing. CS1 Latin-language sources la Articles with ‘species’ microformats Articles containing potentially dated emfrita from All articles containing potentially dated statements.

When burrowing, swimming, or crawling, it always moves backwards.

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