These interesting little creatures are Christmas Tree Worms. They are a type of tube worm that is fairly common in tropical coral reefs worldwide. They are filter feeders and eat whatever drifts by into their extended fans. The fan also serves as a gill for respiration. There are many fan colors and patterns. The fan on these particular worms were about an inch in diameter. If you approach them too quickly, they instantly retract down into their hole and cover the entrance.
Michael Fuchs Photography 
Wow, they do look like trees! Thanks for sharing!
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I agree; I think they look like little trees, too. 🙂
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Cool!
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Yeah, I think they are pretty neat.
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I am always amazed by the variety in nature. It is fun to notice the small details and differences.
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I totally agree. Seeing all the detail in nature is one of the things I like most about photography.
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It must have taken a lot of patience to take these beautiful, detailed photos of these little guys.
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They really are easily scared, so it take a good bit of time to get a photograph of them.
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