Just got some live rock and saw this

[hertz4319]

Does anyone know what this is and is it ok. Thanks Stewart
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[sewer urchin]

No worries... sponge

 

[1mbrews8]

looks like a sponge... it's ok

 

[camellia]

The oval one that looks like a pineapple is a "pineapple sponge". Is the other stringy sponge pink? If it is and you don't want it growing, expose it to light and flow, it slows growth.

 

[jrhunter0000]

Just a sponge. Some dont like them because they are ulgy but they wont hurt anything..