6. Christmas Tree Worm

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This one would actually be quite well-suited to be tagged with a name that includes the word “frilly,” and perhaps be proud to have it. These things surely don’t look like worms, and it’s easy to see how they came to be called Christmas Tree Worms, although we still think they should have made an effort to work the word “frilly” in there. We will admit, however, that it is a better name than Spirobranchus Giganteus, which we have difficulty pronouncing.