What is the definition of Astartoidea?

Ah, let's dive into the world of taxonomy, where even the most obscure creatures have a name! 'Astartoidea' is, in a nutshell, a bizarre group of extinct marine arthropods that were essentially the ocean's version of the creepy-crawlies but way more... starto-y. Imagine if you had a pet jellyfish, but instead of being cute and cuddly, it had a personality as complex and unpredictable as a tarantula's web.

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Now, here's a sentence that might just make you pause: "I decided to add 'Astartoidea' to my collection of existential dread because now my beachcombing session feels more like an underwater horror movie than a seaside picnic."