→ link to NOAA coral webpage The basic living unit of the class Anthozoa (further subdivided into subclass Hexacorallia , which includes stony corals, and subclass Octocorallia , which includes soft corals) is the polyp . Polyps can occur

source Corals are living organisms in the phylum Cnidaria. There are two main types of corals: soft corals and stony corals (also called ‘hard’ corals). Stony corals of the order Scleractinia are the corals primarily responsible for reef format

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* visitor's guide *

Below each index page image is a single word which gives a hint to the subject on that webpage.

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Clicking on any index page image opens a webpage, which most often contains an illustrated 1,000 word essay and an image collection. External links are provided to offer in-depth discussion of the subject.

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*** The layout and organization of imagessays.com is a bit tangential by design, leading the visitor to an exploration of related subjects, informing in an unexpected manner, and so expanding the knowledge base of the viewer. ***

primary webpage: seeing

secondary webpage: marrow

annotated list of webpages: * annotated *

“Whenever I discovered something which was noteworthy,

I have felt it my duty to put down what I had discovered,

in order that it would become known to the educated world.”

Antonie van Leeuwenhoek

Letter of June 12, 1716

… see: microscope

“Sharing knowledge is the the greatest of all callings.

There is nothing like it in the land".”

The Instruction of Dua-Khety

… to his son, as he entered scribe school c. 2000 BC, Egypt - Middle Kingdom

… see: seeing

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explanation of website design

* annotated index of selected webpages *