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6 Topic Pages Found in Marine Sciences and starting with the letter P
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All A B C D E F G H I J K L M N O P R S T U W
Open Pacific Ocean
Pacific Ocean

largest and deepest ocean, c.70,000,000 sq mi (181,300,000 sq km), occupying about one third of the earth's surface; named by the explorer Ferdinand

Open Pearls
Pearls

Originally, and until the last century, one could only dive for pearls, and few of the shells collected during dives contained any. They were thus

Open platypus
platypus

( plăt'əpəs ), semiaquatic egg-laying mammal, Ornithorhynchus anatinus, of Tasmania and E Australia. Also called duckbill, or duckbilled platypus, it

Porifera

( pōrĭf'ərə ) [Lat.,=pore bearer], animal phylum consisting of the organisms commonly called sponges . It is the only phylum of the animal subkingdom

Precipitation

PRECIPITATION REFERS BOTH to the process by which particles fall from clouds to the earth below, and to those particles themselves. Owing to various

Open Protective coloration
Protective coloration

coloration or color pattern of an animal that affords it protection from observation either by its predators or by its prey. The most widespread form