Please ID the critters on my Glass.

I'm pretty new to the hobby and This is my first post. A week ago, my 55gal tank was hit with marine ich so I quarantined all my fish. These little critters came out of my glass and growing.

#A & #D - came out one morning all over my glass same time when I saw my yellow tang and blue tang with white spots allover their body. Are these parasites? or copepods?It seems that there was an outbreak of these after 3 days of starting treatment of my fish on the Quarantine tank. The glass looks like they have a lot of dust inside. After that ,they seem to dissapear gradually.

#C - Is this a type of worm? I also saw the attached to my turbo snails.

#B - What are these? I saw one like 4 days ago and now there are about 7 of these already on the glass.

Please help me ID them and If they are safe on the aquarium.
Thank you in advance
Jason

 

A & D are copepods. B is a hydroid and C is a feather duster worm.

None of these are harmful.

 

Here's some helpful links:

Melev's Reef - Visual Identification
Hitchhiker FAQ
http://www.petsforum.com/personal/trevor-jones/hitchhikerworms.html
Staurocladia

 

That's great to know the these are not harmful. Great links. bookmarked it already. Do these usually stick on the glass? I did ask because they are becoming unsightly. How do I control them? Thanks

 

They will always stick on the glass, yes. The only way to control them is to eliminate them which is not something I'd want to do, with the exception of the hydroids but most likely, they'll go away on their own or grow into pest anemones. Search this site for "hydroids" for more information as there are a few threads on the topic that you might find useful.

 

Thank a lot. I Appreciate your help.

 

I got little featherdusters all over the glass in my tank. Its pretty neat. They a few of my christmas dusters have started to grow on my Live rock

 

Some are parasitic.


look under crustaceans
http://www.wetwebmedia.com/parasiti.htm