Blob and Worms

[crabgrass]

Pulled up one of my rocks today while doing a deep clean and discovered this disaster. What is this? Should I remove

 

[Rtaylor]

The white tube is from a feather duster most likely. The blob I’m less sure, but if forced to guess…some sort of sponge?

 

[ISpeakForTheSeas]

Any chance of a pic of the blob in the water under white light?

 

[Steve and his Animals]

Not the best picture, but the "blob" is likely a tunicate/sea squirt. Check the top for a couple round openings. Tunicates are actually reasonably closely related to us, as they are chordates, not invertebrates. I also vote for a white-light pic in water.

 

[crabgrass]

I moved respositioned the rock in question, and today i discovered this popping out. Could that semi-translucent blob been a Nem? This rock has been in my tank 1+ years (and last piece i put in it).

 

[exnisstech]

Very well could be a type of nem. The blob did resemble a closed nem and the recent shots look like a nem but I'm not knowledgeable enough to offer an ID. Perhaps one of the #Cronies can take a look?

 

[F i s h y]

Very well could be a type of nem. The blob did resemble a closed nem and the recent shots look like a nem but I'm not knowledgeable enough to offer an ID. Perhaps one of the #Cronies can take a look?

The rock appears to be gulf rock or keys rock by the appearance and presence of the bivalve on the bottom. The nem reminds me of either a warty sea anemone or a light bulb anemone.

 

[crabgrass]

Thanks so much. Interesting detective work. If indeed this is a nem, it’s been living on the bottom of a rock for 12+ months with no light. Could I safetly expose it to light on another side of the tank?

I have a few fish, no negative interaction with them?

 

[crabgrass]

one the guess that it is a Warty Sea Nem, there was a pile of snails in close proximity to where the rock was. Is it possible that it was killing off some of the snails? It would happen occasionally early on, but the body count increased signicanfly the last several weeks. I thought there may have been something toxic growing in the tank

 

[ISpeakForTheSeas]

Could that semi-translucent blob been a Nem?

Definitely could be - the nem in your pics there has club-tipped tentacles, so it's either a ball anemone of some kind, or a club-tipped anemone (Telmatactis sp.).

Personally, I'm leaning toward a Telmatactis sp. (which are known to eat mollusks such as snails), but white light pics may help with an ID.

Some Telmatactis genus info:
https://www.gbri.org.au/SpeciesList/StudentProject2016|MiaGustavsson.aspx#Section2029