Help please..

[NYReefer]

Hey everyone happy new year!! With all the beutiful corals i got at the swap I made the mistake of not treating for flatworms and i believe this is what i have.. i noticed these a few weeks ago but was just able to get pics up.. they are now all over the rocks and some on the glass.. i only have 10 months experience in the hobby and have been reading up on flatworms.. there is pleanty of info on how to get rid of them, but my question is what is it that they actually do?? i havent been able to identify the ones i have maybe you guys could help out any input is much appreciated!!

also, i noticed this thing one day and took a pic and havent seen one since could someone tell me what it is and if i should be concerned..

 

[NYreefNoob]

Last Photo Looks Like A Monti Eating Nudi, Not Good At All

 

[Killerdrgn]

Looks like quite a large monti eating nudi at that.

 

[Chiefmcfuz]

First one is a flatworm, last one looks like a nudibranch as stated before, have you had any coral loss in the tank that looks like it was eaten from the inside out?

 

[NYReefer]

thanks for the quick responses.. no coral loss here, the only loss i had is from when i went away for the weekend and asked my sister to feed and top off the tank gave her specific directions and wrote them down couldnt have been easier "FILL UP TO THE LINE WITH WATER IN THE BLUE CONTAINER RIGHT NEXT TO MY TANK" ps she stays at a friends house for the weekend and has my mom do the task and she topped off with tap water!!!!! i lost my acro nana, an unknown acro, and almost lost all of my superman monti, but i was able to frag it and w.e survived has grown back so now i have 2 superman frags and a nice sized le rainbow monti that does real well along with a frag of that and ive seen no problems with them at all..

 

[NYReefer]

this episode happened in october, i had cyano and hair algae problems after that also but didnt last long because ive been running phosban since the summer.. the wierd thing is i wasnt sure if the nana was completely dead or not and i left it and recently this neon green with a touch of burgandy and burgandy polyps has been growing over the skeleton it looks pretty cool but looks nothing like what the nana once looked like.. i have been having problems with a couple of my zoas the past few days they wont open all the way, but this might be due to me not doing a water change in almost 3 weeks because i was waiting on my shipment of salt, i will certainly do that today.. also i noticed a few of my larger snails are dieing 2-3 turbos and astreas empty shells on the sand bed idk if there is any connection there is a ton of tiny ones i guess they reproduced like crazy

btw the pics were both taken on dec. 8th i just got the pics up now because my comp was broken..

 

[NYReefer]

what is it exactly that these flatworms will do to my tank besides cover the rocks and glass?? im sure diff species eat certain things but i have seen no problems the past month or so since i discovered them..

 

[NYreefNoob]

the nudi check all and any montis you have, they wont come out till night time and if ya start to see eaten or dead at the base good chance it's on something
http://www.reefkeeping.com/issues/2005-05/rs/index.php

http://www.saltwaterfish.com/vb/showthread.php?t=338879