The average everyday plant-like crinoid not only walks about, it swims!
Crinoidea is the fancy name for feather stars and sea lilies. They look very plant or coral like but are actually relatives of the starfish. They tend to have feathery arms in multiples of five, and they sit on stalks (in sea lilies) or have little feet called cirri (in feather stars). Feather stars can walk around on their cirri, or they can swim about using their ten arms (it's crazy!). Check out the videos for more.
An informational video by the Monterey Bay Aquarium. A good overview of the Crinoid order. It finishes with a breathtaking shot of a swimming feather star.
For those of you with ADD, here's the short version:
Bonus song: Help I'm Alive by Metric. It's what I'm listening to while I type :B
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