Two hitchhikers growing

[TheOverfeeder]

I'm brand new to this hobby, and only got live rock into my aquarium last week. It looks like I have 2 different things growing on the rocks. On the image below, you can see several of these clear tube-like things that are curled at the base.

In the picture below, you can see a large grayish object that kind of looks like a shell. At the base it almost looks like it is attached by tiny spider webs.

Thank you so much!



Eric

 

[vetteguy53081]

Pics a little fuzzy but looks like both sponge and tube worms. Tube worms generally emit fan type head to capture food source

 

[MaxTremors]

Looks like tube or spirobid worms (not sure if they are alive), could also be dead vermetid snails, and in the second photo, some sponges.