What's growing on my rock?

Key Equine · #1 03-18-2009, 11:41 PM

Can anyone tell me what these pink/clear thingys are on my live rock?

my2rotties · #2 03-19-2009, 12:17 AM

I think they might be sponges.

reeferious · #3 03-19-2009, 12:53 AM

i believe these are tunicates except yours look much nicer than those growing in my tanks.

High tide · #4 03-19-2009, 03:15 AM

Sea squirts....tunicates.

RSM · #5 03-19-2009, 04:09 AM

I have these aswell.

Myka · #6 03-19-2009, 08:43 PM

Pineapple sponges. Pretty much all tanks will get them, especially in overflows, sumps, and filters. They are beneficial filter feeders.

untamed · #7 03-20-2009, 01:34 AM

I'll vote for tunicates as well. I belive that the pineapple sponges have only 1 primary hole and they look more prickly, while the tunicates always have 2 primary holes and look glassy. My completely non-educated opinion only.

my2rotties · #8 03-20-2009, 01:49 AM

What function do tunicates have? Are they good, bad or neutral?

Myka · #9 03-20-2009, 02:00 AM

Key Equine, judge for yourself - this is a good photo of a Pineapple Sponge. Is this what you have?

chandigz · #10 03-20-2009, 04:10 AM

They look like tunicates to me. They have an incurrent and outcurrent syphon.
They are filter feeders and should not cause any problems in a tank. I've actually purchased larger species.