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Introduction to Cnidaria

https://ucmp.berkeley.edu/cnidaria/cnidaria.html

“Cnidarians are incredibly diverse in form, as evidenced by colonial siphonophores, massive medusae and corals, feathery hydroids, and box jellies with complex eyes. Yet, these diverse animals are all armed with stinging cells called nematocysts. Cnidarians are united based on the presumption that...” (from the page’s text)

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