i bought my live rock yesterday and when i brought it home and put it in the tank, i noticed that there was something hiding in one of the caves in my rock so i left it alone. when it finally came out (since iv studied marine biology in high school) (I'm 16 only ) i came to the conclusion that it is a little red sea anemone. i know what a feather duster looks like and this is so not it! if i touch it, it will retract back into its little cave. but here is the thing, im not completely sure if it is an anemone and if it is, what type. its column of it is about an inch and its longest tentacle is about another inch. it has a short bottom row of tentacles then above the short ones is a row of long tentacles. its a red/brown (almost blood red) color and retracts when touched. any ideas what type it is ?

http://www.aquariumparadise.com/FishFinder/tabid/845/Default.aspx

this is a link to the website of the store i bought the rock form, so it will help narrow what type of anemone it is

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