Andrew, a marine biologist writes, "I call it 'the balance of the deep.' Two hydrothermal vent endemic gastropods to commemorate my first deep-sea cruise. The one on the top is Alviniconcha hessleri and the one on the bottom is Ifremeria nautilei."
Carl: For more on these cool critters--which live at the bottom of the sea around vents that spew scalding water, getting their food from chemical-feeding bacteria that live inside special organs in their bodies--check out Deep Sea News.
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