Literally, if you can get to the beach, you can dig these up with your hands pretty much all year long.
True crabs have four developed pairs of walking legs, upper shells with points, or teeth, along the margins, and usually a pair of claws.
I just tried some mole crabs last night.
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The digging requires the sand to be by wave action, and Emerita must bury itself in the correct orientation before the wave has passed to be safe from predators.
Mole crabs normally feed on plankton and other small organisms in the water, but they are also known to eat the toxically armed tentacles of Portuguese man o’ war, a jellyfish whose stings are very painful to humans Mole crabs are an excellent example of an animal that has perfectly adapted to living in a specialized environment.
mole crab, ( Emerita, or Hippa, talpoida ), also called sand bug, crab of the Atlantic beaches from New England to Mexico. It is so named from its digging mole-fashion in sand. The shell is about 3.75 centimetres (1.5 inches) long, somewhat egg-shaped and yellowish white with purplish markings.
The Pacific Mole Crab’s body is roughly the same shape as an egg. Their carapaces, which are bony or chitinous cases or shields that cover the back or part of the back of some animals, are 3.5 centimeters long, and have a trio of teeth in front. The carapaces are smooth, with the exception of small, transverse ridges on the anterior portion.
The mole crab has two pairs of antennae, which protrude from the hole of its shallow burrow. One pair serves breathing. The other, feathery topped, sieves plankton from each watery pulse over the hole. The telltale bubbling after the tide retreats is often the lone clue to the life beneath one’s feet.
Mole crabs, however, are not true crabs. True crabs have four developed pairs of walking legs, upper shells with points, or teeth, along the margins, and usually a pair of claws. Mole crabs, on the other hand, resemble a grape more than a crab and are classified as an Anomura crab, along with hermit crabs. Anomura means “differently-tailed”.
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