transparent

I noticed a transparent/translucent worm on my glass. It's not big, maybe half an inch. It also has odd looking mouth parts. Any ideas?

Hi !! This is my first saltwater tank, this white/transparent thing is starting to grow in bright and dark areas, also in high flow and low flow areas of the tank. Tank is 9 months old and pink coraline is starting to grow everywhere. I have not introduced anything in about 8 months, any...

After feeding my tank last night, I noticed some motion and took a closer look. It was a long transparent tentacle coming from the live rock. The head was wriggling around pretty good. I took video with my phone, I apologize for poor quality. Make sure to view in 1080p: I've gotten pretty...