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The word phylum (plural: phyla) is a category used to classify marine organisms. In this article, you can learn the definition of phylum, how it is used, and examples of phyla used to categorize marine life.
If these possible clades, candidate phyla, are included, the number of phyla is 52 or higher. Therefore, the number of major phyla has increased from 12 identifiable lineages in 1987, to 30 in 2014, or over 50 including candidate phyla. The total number has been estimated to exceed 1,000 bacterial phyla.