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FAQs about Sea Squirts 2

Related Articles: Sea Squirts/Tunicates/Ascidians

Related FAQs:  Ascidians 1, Ascidian ID, Ascidian Behavior, Ascidian Compatibility, Ascidian Selection, Ascidian Systems, Ascidian Feeding, Ascidian Disease, Ascidian Reproduction,           


Polycarpa aurata  6/5/06 Hi Crew My tank is 100 gallon with 80 gallon refugium 1.5 years old. The parameters are all ok I just acquired 7 Polycarpa aurata <Neat animals> and I put it in my refugium full of kelp (the brown one) <More, much more than one...> and the light is not intense. Everyday I shake the kelp so the detritus fall on them and pour the Nanochloropsis. I heard people says it is very difficult to maintain in aquaria. So my question is how long the life span of this species actually?. <In the wild, years> I've also read the Steve Tyree's comments about the zonal required for the tunicate <Not "the"... there are many species of ascidians, of highly differing habitats...> and I think my refugium is semi cryptic. <Polycarpa spp. are not cryptic by any measure...> And also I've consulted Gretchen Lambert about this species and she said it is not difficult to maintain them so now I'm confused. So, today in the morning several of them didn't want to open the excurrent opening and I saw the mucus around the body, is that a sign that they will die? Is this species are highly toxic? <Not necessarily and not as far as I'm aware> Thank you for your input and your help Best regards Ignatio <Perhaps a search of literature at a large college library... Bob Fenner>

Coral or Tunicates?  11/9/05 Greetings crew (or Bob, of course) <Hello Sam, stuck with Josh I'm afraid.> Thanks to the help I've received from you folks over the past several months, I'm now enjoying watching new critters appear from the recent addition of live rock into what will eventually be a 125 gallon reef. <Makes television seem overrated doesn't it!>  I awoke one morning, and discovered the critter pictured below, and am wondering if you can help identify it. <I'll try.>  My best guess is that it is a hitchhiking bit of Pocillopora (verrucosa perhaps?). <Hmm...Structure seems too smooth (no fuzzy appearance).>  I suppose I could just be patient and see what it turns into, <I doubt it will change.>  but my patience is currently being spent on going fishless for 6 months to allow pods to develop. <Good. Stocking too quickly reduces much that comes with live rock (I'm sure it's still torture).>  For what it's worth, this is a group of three, with the bubbly appendages extended. There are several other groups of single (polyps?), and I'm discovering more singles everyday. <Sounds like tunicates to me.>  <<DEFINITELY appear to be tunicates to me.  Very exciting, this means your system is doing very well!  Of note (explained in further detail in the book "The Natural Marine Aquarium - Reef Invertebrates", tunicates are actually members of the Phylum Chordata - chordates are those with a spinal column (of sorts in a tunicate), Class Ascidiacea Pretty neat, huh?  Check out this site if you're interested in ascidians http://ascidiacea.com/.  Also of note: There seems to be a difference in spelling of this class, I find 'Ascidiacea' as well as 'Ascidiacea'.    MH>> More photos available if it will help. I don't currently have any with the appendages retracted, but could endeavor to take some. Any help you can provide would be greatly appreciated, <I hope it has.> Thanks, Sam  <Welcome. - Josh>
Sponge/Asc. identification  9/29/05 Is there any chance you could identify this splendid sponge for me?  At least I think it is a sponge--it appears to have siphonophores. The photo was taken in the Red Sea <A nice pic... of an Ascidian, sea squirt... Please see here: http://wetwebmedia.com/ascidians.htm Bob Fenner>

Tunicates? Hi Gang, <Brandon> In doing my homework before buying a tunicate, I see that various members of the board have a low opinion of keeping tunicates. This is understandably so, but I have a caveat to ask about. What if I am feeding live phytoplankton regularly to my tank for my small clams and corals? The mix I use has 5 different live varieties of phytoplankton in it. Would this cause you to change your mind, or should no one keep them no matter what suspension foods are fed? Thanks! <These ascidians are really neat organisms... and a blessing to have "just show up" in well-set-up and maintained reef systems... Most feed on more than small unicellular algae... but... worth trying to keep individuals, a colony in a well-established, otherwise un-crowded setting... with a good sized healthy refugium tied in. Bob Fenner>

Dismal survival: Lollipop "coral" Tunicate 3/14/05 Dear WetWebMedia, I've been trying to find information of blue tunicate:  http://seadwelling.com/v-web/gallery/MarineInvertebrate/bluetunacate080904 . However, I have not found its scientific name or any information of this species. Do you guys anything about it? Thanks a ton in advance, Robertino <commonly ascribed to the genera Oxycorynia or Neptheis, this tunicate is referred to as the (blue) Lollipop "coral". It has an absolutely dismal rate of survival in captivity. It escapes me why the organism is even collected or offered for casual hobby use (versus collected for scientific use, study or at least species specific home tanks with focused care). Anthony>

Sea squirt hitchhiker on LR Dear All <Peter> Am a new hobbyist here in England.  Your pages are by far the best I've come across.  Brilliant, educational and encouraging stuff. <Glad we have found each other> Now the question - hidden behind a (cultivated?) soft coral I bought recently is a sea squirt - beautiful and interesting - but should I dispose of it, due to toxicity etc, before it dies a quick death, as your FAQs imply, or should I see how it goes? <I would definitely leave it be... these ascidians are almost never a problem in just "popping up"... and a good sign of your good husbandry that they do so> Would love to keep it, but not if I risk a disaster. Yours
Peter Hosier, London
<Bob Fenner>

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