Worm living inside my Zoa 10/26/09 ???? A while back I took some pictures of this worm looking thing coming in and out of my Zoas, here it is: This was a while back and eventually I stopped paying attention to this. But for the past few days the Zoas have been... not extended to their full potential and I picked them up to take a close look. I saw something that caught my attention. It looked like a shell that was growing between the polyps. I got a tweezer and broke it up, turns out to be a tube. Yeah, it looks like there's tube growing into the Zoas! <It's just a hitch-hiker tube-dwelling worm of some sort or another (further ID unlikely). It's nothing to worry about and not why your Zoas are not extending.> You can see it right in the middle WHAT IS THIS?! <See above. Cheers, Sara M.>

Nudibranch ID help 05/29/09 I can't find a match for this lil critter, the Nudi's body is apprx. 1/4 "long. Thank you, Paul <Hmm, can you give us any more information? Did you find this little guy on one of your corals? What corals do you have? Cheers, Sara M.> Re: Nudibranch ID Help: Zoanthid Predator – 5/30/09 <Hello Paul, Lynn here this afternoon.> I recently set up a new tank, it was a hitchhiker on one of the frags <Betcha it arrived on the Zoanthids.> ... it was on the glass, if you zoom in it is actually a beautiful Nudi <Yes, it is.> ..but I have it in a specimen cup till I can find out if it is safe in the tank. <Good, because it’s definitely not safe around your Zoa’s.> It was on the glass not a coral <Good. What you have looks very much like a notorious Zoanthid eating Nudibranch. They’re mostly a brownish/orange and white, but take on the color of the Zoa’s they’re preying upon. For more information, please see the following link, starting at “Re: Polyp-feeding Nudibranch” all the way down through the “Re: Perhaps a gorgonian feeder?” posts: http://www.seaslugforum.net/showall.cfm?base=palyfeed Terrific photo: http://coralpedia.com/index.php?module=Gallery2&g2_itemId=641 More photos, showing color variation: http://coralpedia.com/index.php?module=Gallery2&g2_itemId=415 I’d keep a close eye on your Zoa’s for any indication of predation or signs of additional Nudi’s. If you see either, please refer to WWM’s FAQ’s for removal tips. Just enter Zoanthid Nudibranch in the Google search engine: http://www.wetwebmedia.com/Googlesearch.htm > ..but I have frags of Zoa’s, pipe organ, Montipora danae, chalices and good ole GSP in that tank. <All but the Zoanthids should be in the clear – at least as far as these particular Nudi's go! Take care, LynnZ>

Palythoa Polyps Shrinking 5/19/09
I have a lovely brown/pink palythoa introduced to my 29-gallon cube about 5 weeks ago. The 8-polyp frag was initially very healthy - large heads approximately 1 cm in diameter, thick 3/4 inch long stalks and plump interconnecting mat fibers.
< Sounds nice. I'm a big palythoa fan myself. >
I placed the colony near the bottom of the aquarium in a well lit area with good flow. The polyps responded well and accepted food readily. Within 10 days, the colony started reproducing rapidly, sprouting five new polyps that grew very quickly. Success - until about two weeks ago.
Very gradually, the polyps have started to shrink considerably - not retract, but actually physically shrink. Heads are now just 1/2 cm in diameter, the stalks have thinned and shortened and interconnecting mats have thinned. The healthiest polyp has actually grown up an adjoining rock approximately an inch and attached itself quite securely.  I'm lighting with a single 40 watt 10 K and actinic compact fluorescent and all water parameters seem in order. I have added a second single tube standard 15-watt 50/50 10 K florescent and increased lighting hours hoping that this might be a lighting issue. My three other small zoanthid colonies are thriving and growing - only this small Paly colony seems affected.  So, some specific questions:
1) Does this sound like a lighting issue and does the colony simply need to be moved up to the top third of the tank, or is it more likely a nutrition/feeding deficiency that is causing this shrinkage?
< It does sound like a lighting issue. I would move the colony up closer to the light. If you do not see an improvement you may want to consider a lighting upgrade. >
2) If a move is in order, can I safely sever the now very thin mat connection with the "polyp on the move" with a razor while in the tank to allow movement of the main colony? It is not feasible to remove the two rocks and perform the surgery outside of the main system.
< Yes , you can use a clean razor to sever the mat. Please use caution when handling/cutting them. Some people have had extreme reactions to the toxins present in zoanthids/Palythoas.
GA Jenkins >

Zoa Pox Treatment  – 05/09/09
Have you any information on treating a reef tank directly with FURAN-2 to treat Zoa pox? any information on the affects on live rock?
<Mmm, yes it can... the route to go here is to place the Zoanthid colonies in a separate container (outside the system) with some system water of slightly reduced spg (just add a bit of freshwater), to aid in absorption... and the Furan-2 made stronger in concentration (250 mg., a capsule, to a gallon or so) for an immersion bath... then the Zoas should be rinsed in another separate container of just some more of their system water before being returned to the main system or better, moved to another established tank. Bob Fenner>
Thanx Gregory

Button Polyps, hlth., beh.   04/02/09
Hi
Yesterday I visited my local LFS to have a look at there marine tanks. They have only been keeping marine fish for about a year, and only have 2 small tanks.
About a month ago they bought in a piece of star polyp, a button polyp and a white toadstool. At first they looked ok then after a week the star polyps started to disappear, the button polyp has stayed closed since, and the toadstool has got a tear in the middle of it, and has gone grey around bits of the edge.
I asked the girl in the shop what had happened to them but she did not know, all she said was that this is the second lot of corals that she has had in, the first lot all died. At first she did have them in a tank with a lemon
peel, I did tell her that the lemon peel would eat them, then she put them in the other tank with a Eiblii angel. I suggested to her that I take them home and see if they would recover in my tank, with better lighting and more water flow, which she agreed to.
<That was nice of you.>
When I got the button polyps home, I noticed that they looked as if they were covered in a hard clear coating like varnish, when I put them in the tank some of this coating started to come off, it just looked like clear egg shells lifting off and floating in the water, do you know what this might be?
<The animal is disintegrating/dying.>
Half the rock that the star polyps were on is covered in coralline algae and the half that the polyps were on is all brown, like fine algae, as the evening went on I did notice small light coloured stalks appear through the
brown muck, so hopefully they might re appear, what do you think?
<It sounds like the coral might still be alive... but in bad shape.>
The toad stool looks as if it is molting as there is thin bits like skin coming off.
<It could be shedding due to stress.>
I have only had my marine tank up and running for 4 months and all the corals that I have, are growing well and looking very healthy, I could not let the corals in the shop die. There are only 2 other people on the
island that keep marines, so I had to try something, do you think I did the right thing? any help and advice would be most helpful.
<Well, it just depends... I don't usually encourage people to "rescue" LFS animals because, like any business, a LFS will keep taking in whatever it can sell (sick or not). But, if the LFS let you have these corals for free because they couldn't care for them, then I commend you for saving them without supporting a bad business practice. However, if you paid for them, I would caution you that doing so will only encourage the store to get more (without necessarily learning anything). If you want to be extra-super, you could offer to help the LFS learn how to care for these animals so that if they order any more, they will know what to do.>
Another question I have for you (sorry), I have a friend that works at a water test center, where they breed Acartia tonsa copepod and brine shrimp,
<neato>
She gives me small amounts every few weeks for my tank, can I put too much Acartia in, or is there no limit to the amount that I could put in.
<Well, you can have too much of anything... I would put in as many as your fish/coral can eat and as can survive in your system without dying and causing water quality issues.>
The fish seem to love hunting them and the excess seem to crawl about the glass and on the live rock and bottom, will they do any other good in the tank, like eat some of the algae etc?
<Possibly... but I wouldn't use them for this purpose. Please see here:
http://www.caspianenvironment.org/biodb/eng/zooplankton/Acartia%20tonsa/main.htm>
Could I over feed the tank with them?
<If they're staying alive in the tank until they are eaten, then I doubt it. Again, I would only be concerned if you put sooo many in that they started to die off (without being eaten) and cause water quality issues.
But so long as they stay alive, I don't think they would be much a problem... they might even be beneficial.>
as I can get as much as I want from her. She also supplies me with Phyto plankton, how much should I put in the tank at one time? My tank is 6 x 2 x 2 and I also have a sump that holds 22 US gallons.
<Hmm, it depends on if the phytoplankton is live and if it is concentrated or not and how many filter feeders you have in the tank. In any event, I would start with small doses and slowly increase until you get the "right"
amount.>
Thanks great web site
Kenny
<De nada,
Sara M.>

Re: Button Polyps 04/03/09
Hi
Do you think there is no hope for the button polyps or the star?
<I do think there is hope still. I "never say never" with button polyps.
They seem to be able to come back from just about anything.>
Should I take the button out or leave it to see what happens could it affect the rest of my corals in some way if I left it?
<If your tank is larger and these are just "frags"... then the tank should be able to process any nutrients from a bit of die off. But if you think they're affecting your water quality, it's your call to remove them or not.>
I could not open the web address that you sent me about the Acartia.
<Sorry, the site seems down right now for some reason. I'd try again later.>
Thanks
Kenny
<De nada,
Sara M.>

Re: Button Polyps... referral?  04/03/09
Hi
The button polyps are on a rock about 4in round, they are all over the rock, there must be at least 100 polyps maybe more. Each polyp is about 3/16 of an inch in diameter, there still seems to be a bit of colour in them and you can see a hole in the center of them just like my other button polyps that I have, when they are closed at night, or if something touches them.
<These are good signs. I do think they can/will pull through with proper care.>
I will keep an eye on them, and keep my fingers crossed.
I got all the corals for nothing.
<Cool.>
Thanks again
Kenny
<Good luck,
Sara M.>

Re: Button Polyps    04/04/09
Hi Sara
This morning I had a look at the button polyps, there was a white covering all over them, looked like spiders webs. I blasted water at them with a syringe and blow most of it off. Early this evening I was looking at them again, and around the one side there are about 10 polyps open, looking better than the last few days.
<good to hear>
The phytoplankton that I get is live, it is a mixture of 2 types, not sure which types they are.
The last 2 time I only asked for 100mls and add 50 to the tank at the time,
<This should be fine.>
and add some to the sump. Is this too much to add at one time? Could the phyto add to the growth of algae in the tank?
<It could if either 1) the culture is high in nutrients or 2) if you don't have enough filter feeding organisms to consume it and it dies. But I think you're safe with those small doses.>
Thanks
Kenny
<Cheers,
Sara M.>  

Snails, Zoa Deaths, and good pix. 02/11/09 Howdy! First off my wife and I had the pleasure of meeting Mr. Fenner in Dallas at the Next Wave 2009 event. He gave the most dynamic, and informative presentation. The other presenters had good info, but they were geeks ( in a good way, really :) <Thank you for saying this re Mr. Fenner's presentation. I always try to tell him he's the best, but he thinks I'm just "sucking up" or something. I've been to a lot of marine aquarium conferences/presentations, and many are interesting... but (imo) none are as equally informative and entertaining/well presented as Roberto's.><<Ho buoy! RMF>> Now for my questions. 1: Our Zoas are dying off in patches. We have tried RO and Lugols dips to make sure we don't have spiders or any other evil critters. Well, we found Sun Dial snails. How the heck do we get rid of them? <You have to quarantine the zoanthids and meticulously remove all the snails... and, as gently as possible, scrap off all the snail eggs.> We removed 3 or 4, but we keep finding one or two every now and again. We really want to put more Zoas in, but when? <You need to quarantine the infected colonies asap. I wouldn't add anymore Zoanthids until you haven't seen any snails for at least 2 weeks.> 2: We set up a pico tank and found the coolest hitch hikers. We think the coral is a Caulastrea. It is in bad shape, but seems to be getting better! The other is a beautiful snail, any ideas on what it is? Is it evil? <It's difficult to ID snails from photos... but I do think this is one of the Nerite sp. of snails (usually beneficial).> The pix are attached. You can find the originals at http://william1034.smugmug.com/gallery/7329746_Q9Y4q/1/471608269_j6LtS We are still learning so please leave comments with the pictures. William <Cheers, Sara M.> Btw, you might want to collect those snails and sell/give them to someone with a zoanthid "problem." I do recall going around with a friends, actually looking for these little guys because their zoanthids were growing out of control (as tends to happen). Though they're a pest for those just starting out with small zoanthid colonies (and for those in love with these corals), they're actually appreciated/welcomed by some with more stony coral focused systems (that happen to have some stray zoanthids run wild). Cheers, Sara M.