There are approximately 32,000 species of fish, representing the greatest species diversity of any vertebrate group. Mollusks, with around 85,000 extant species, constitute the largest marine phylum and about 23% of all named marine organisms. Crustaceans, with about 67,000 described species, are arthropods that range in size from .004 inches (Stygotantulus stocki) to over 12.5 feet (Japanese Spider Crab). The diverse algae group includes unicellular and multicellular organisms, such as seaweeds, dinoflagellates, red, green, brown, yellow and golden algae, and diatoms, to name a few.
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