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Split-Crown Feather Duster (Anamoebaea orstedii): oval gills split into 2 equal halves. Bands on gills brown to red or purple. Photo by Mary Zelmer |
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Social Feather Duster (Bispira brunnea): grow in clusters from visible tubes. |
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Star Horseshoe Worm (Pomatostegus stellatus): horseshoe shaped gills. Gill color ranges from red to yellow, and might be banded. |
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Christmas Tree Worm (Spirobranchus giganteus): paired spiral gills, often with hidden tubes in mustard hill coral |