PhoticZone - In the top hundred feet (thirty meters) of ocean, where sunlight can penetrate, live 50,000 species of plankton - the smallest marine plants and animals.
Salamander - Amphibians such as salamanders and frogs breathe through gills until they grow into lung-breathing (or skin-breathing) adults and leave the water.
Saturday, July 15, 2006
July 15 - Photic Zone
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