Help identify things growing on live rock

F

fishcrazy101

AC Members
Oct 11, 2008
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Hoping someone can help me identify a couple things growing on the rock. First is white that looks like flower and when a fish swims by it quickly goes back into the rock. The other thing is a round white ball that has thorns that is growing in a hole in rock.

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the first pic is something I have lots of. I have been told that they are a type of feather duster.the 2nd pic Sorry don't have a clue.
 
Would agree on feather duster in the first pic...Second pic, well, cant make anything out on it. Can you get an in-focus picture for us? From your description, i would tend to lean towards a pineapple sponge. Attached a pic of one of these for comparison.

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Thought it was a feater duster but have others in tank that look different than it. Will try to get a better picture of the thorny ball. Thank you so much for the information.
 
more pictures

Hoping this picture came out a little better. We bought 150 gallon tank already established and this all new to me. When we bought it the person didn't take care of it like he should of and now that everything is good on tank, I have things popping up everywhere. Also added a picture of a pink thing in the tank and was hoping someone could tell me what it is, also have a different type of feather duster that started growing. Thank you so much for the information. If you have any other suggestion for me it would be greatly appreciated.

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hey

i think i have fan worms to but mine just started growing there about an inch in height n 1/4 inch in width with little fingers i dont know what to call them they kind of look like the first pic of the feather duster but its smaller n redish pink is that a feather duster too
 
bog: yes, feather dusters come in all shapes and sizes.
fish: as far as the little ball, it id definitely some type of sponge. It's just a harmless little filter feeder.
The pink thing is coraline algae. It's a calcerous algae that will soon grow all over your rock and walls.
 
HERE I GOT SOME PICS KINDA HARD TO MAKE OUT WHAT THEY ARE I THINK THERE THE BABY FEATHER DUSTERS THERE A PINKISH RED AND I GOT ONE WHITE ONE THEY GOT LIKE 20 TENTICLES AND WHEN I FEED MY FISH FROZEN BRINE SHRIMP THEY THEY GO BY THE THINGS IF ONE LANDS ON IT THEY PULL THEIR TENTICLES IN AND EAT THEM GOT A GOOD PIC OF THE WHITE ONE

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