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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It appears temporarily on Washington beaches mainly after warm events such as El Nino years.

It differs from the spiny mole crab, Blepharipoda occidentaliswhich has spines emdrita its carapace and pereopods and typically lives lower in the swash zone in California. Photo by Jon Sullivan. If emerira while feeding, sand crabs—in a manner most unusual for crustaceans—can swim or tread water by beating their back legs. These small animals burrow in the sand in the swash zone and use their antennae for filter feeding.

Ricketts ; Jack Calvin; David W.

Week # 5: Pacific Sand Crab, Emerita analoga

These form a tube which channels water downwards through the gills. Sand crabs can reproduce during their first year of life, depending on the water temperature, and may not live more than two to three years.

The sand crab has been evaluated as an indicator species for monitoring the level of domoic acid -synthesizing diatoms Pseudo-nitzschia spp. The Biology of Soft Shores and Estuaries.


Journal of Crustacean Biology. Natural History of Orange County, California. From Wikipedia, the free encyclopedia.

Emerita analoga

Emerita Female Emerita analoga Scientific classification Kingdom: As the swash zone moves up and down the beach with the tide, so do sand crabs. This movement happens very quickly, allowing the crabs to gather food several times in one receding wave.

To stay put in the sand, a crab burrows quickly and often. The sand crab always moves backwards when burrowing or crawling.

Emerita analoga

By using this site, you agree to the Terms of Use and Privacy Policy. The fmerita lays batches of up to 45, eggs each month and carries them about beneath her abdomen tucked under her telson. As the tide changes, Emerita changes its position on the beach; [5] most individuals stay in the zone of breaking waves.

Sand crabs are a major food source for shore birds and for some kinds of fish. World Register of Marine Species. I am quick to burrow to evade birds Sandpipers, scooters and plovers and fish surfperch, corbina and small sharks that key in on me as a food source.

Because the fisheries throw back hard-shelled crabs, sand crab populations haven’t been affected by bait fishing. Males are typically smaller than females, and in some species, such as Emerita rathbunaethe minute males live attached to the legs of the female. A common sight on the beaches of San Diego County are inquisitive children armed with nothing more than plastic analogaa and a sense of curiosity hunting me in the backwash of retreating waves.


CS1 Latin-language sources la Articles with ‘species’ microformats Articles containing potentially dated statements annaloga All articles containing potentially dated statements. It has five pairs of legs and three pairs of pleopods.

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

From Wikipedia, the free encyclopedia. The antennal flagellum is long and featherlike used for filter feedingbut eerita folded beneath the mouth parts when not being used. As each wave retreats, it extends its antennae and catches floating organisms. Volume 8 of Studies in Ecology 2nd ed. Natural History No bigger than a thumb, a sand crab spends most of its time buried anqloga shifting sand. Dorsal and ventral views of a preserved male, 2.

By using this site, you agree to the Terms of Use and Privacy Policy. Laboratories use sand crabs in neurological analova because the crabs’ tails have the largest sensory neurons found in any animal. Journal of Plankton Research.