Unlike most crustaceans, the hermit crab is more active in the daytime than at night. Large specimens often use shells of the common whelk Buccinum undatum; smaller individuals are found in a wide variety of shells including moon snails (Polinices spp.) and periwinkles (Littorina spp.). Shells selected based on combination of weight, volume, and aperture size, and often covered with the hydroid Hydractinia echinata or the anemone Calliactis parasitica, whose stinging cells (nematocysts) help to deter predators. The crab actively transplants anemones onto its shell; it prods the anemone with its legs in a manner that elicits its release so that the anemone can reattach to the hermit's shell.

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Diabetes 2

Diabetes 2

Diabetes is a disease that affects the way your body uses food. Normally, your body converts sugars, starches and other foods into a form of sugar called glucose. Your body uses glucose for fuel. The cells receive the glucose through the bloodstream. They then use insulin a hormone made by the pancreas to absorb the glucose, convert it into energy, and either use it or store it for later use. Learn more...

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