FAQs about Purple Tang
Purple Tangs, Zebrasoma Tangs, Yellow Tangs
Related FAQs: Purple Tang Disease
Purple Tang Disease 2,
Purple Tang Disease 4,
Tangs/Rabbitfishes & Crypt, Purple Tangs 1, Purple Tangs 2, Purple Tangs 3, & Purple Tang: Identification, Behavior, Compatibility, Selection, Systems, Feeding, Reproduction, Yellow Tangs, Striped Sailfin Tangs, Zebrasoma Tangs, Zebrasoma Identification, Zebrasoma Behavior, Zebrasoma Compatibility, Zebrasoma Selection, Zebrasoma Systems, Zebrasoma Feeding, Zebrasoma Disease, Zebrasoma Reproduction, Surgeons In General, Tang
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by Robert (Bob) Fenner
Purple tang skin issue 2/12/19
I noticed one of my purple tangs has a strange skin thing going on. It almost
looks like peeling skin from a sunburn, or maybe mucus?
<So much the former, with a rxn of the latter>
It’s behavior seems unaffected, and it has no white spots. Not other
fish impacted at all.
<A good clue>
No introductions to my tank for 6 weeks. Prior to that I introduced snails QTed
for a full month. I did treat some Aiptasia with Kalk paste the day I noticed.
Maybe it’s a chemical burn?
Trying to rule out something infectious. I’ll attach several pictures. Thanks as
<I (fully) suspect a glance/exposure to a stinging-celled colony here. Should
heal in time... days, weeks. Bob Fenner>
Purple Tang eye problem
I have recently found your site, I have a purple tang who looked in very
good health when I bought him. On the second day in my aquarium I notice
a singular eye did not look quite right. The issue is now 3 weeks old
and his eye appears to be in the same condition. It looks as
though air is trapped under the lens of his eye. The other eye
looks normal but the fish I would say is more reclusive and stressed
than if his eye were not suffering.
Please see my photo. Is there anything I can do for this <This is a
physical trauma caused by the fish hitting something (likely
rocks/decorations); or by some tankmate nipping at it, please see/read
following link and the related ones:
Cheers. Wil. >
Re: Purple Tang eye problem 12/14/18
Thank you for the reply, I have studied the thread you linked and from
my understanding the best course of action is likely to do nothing as it
seems most like the physical trauma to the vascular network that Bob
commented on 12/27/06 with regard to Holocentrid. Is this correct?
<Yes, as Bob stated.>
Should I dose Epsom salt and if so what is your recommended dose rate?
<Just maintain good water quality and be patient, as complete recovery
may take several weeks.>
Re: Purple Tang eye problem 12/14/18
<Glad to help >
I´ll maintain water quality and hope for a full recovery.
<Good. Please keep us posted>
Re: Purple Tang eye problem 1/10/19
Hello Wetweb team,
I wanted to let you know that my purple tang has made a full recovery
with hyposalinity and the use of Sea Chem Paraguard. I was very
skeptical until about day 13-15 of treatment as his condition did not
appear to be improving. Then one night lights out and the very next
morning he was better. I have continued the treatment for the
recommended length of time and will be bringing salinity back up in a
weeks time but I wanted to thank you for the advice and notify you of
<Glad to know everything is fine with your PT.>
Disease Identification with Photos
Hello Bob and crew!
<Bri! Please re-size and re-send your msg.s WITH MUCH SMALLER files... you've
crashed our mail server. Kbytes, not Mbytes. Thx. Bob Fenner>
Disease Identification 5/19/18
Hello Bob and crew!
It's been years since I've emailed you! I love using your site as a resource. I
have a purple tang going through tank transfer (1.5 weeks so far) with recurring
white spots. There were no spots for a week, but
yesterday a few appeared again. When I first got the fish, the original spots
were concentrated on the ventral side, with only a couple on the rest of the
body. There were maybe ten total. Fish breathing rate was (and continues to be)
normal. Coloration is good. Appetite is fine. There were no spots for a week,
but overnight a few showed up. There were only five spots on the fish this time,
all concentrated on the left pectoral fin. I decided to clip a section of the
fin and take a look under the microscope.
Attached are photos taken at 10x magnification. I'll try to attach a video as
<Please post the video elsewhere; perhaps YouTube, and send the link to it
instead. We have limited mail server space>
Any thoughts on what this may be?
<From the size... looks too big to be protozoal... Perhaps just accumulation of
body mucus... Happens>
Note in the videos that all movement is created by me changing the focus so you
can see the whole cyst.
The organism was not moving at all and I did not see any cilia or flagella.
<Me neither... is this a dry prep.? That is, was there a slide cover over this
specimen with water around it, supporting it?>
However, I just started treating with Seachem Paraguard 12 hrs before taking the
sample, so maybe these parasites are dead?
<Mmm; maybe, but, could be as stated>
Or eggs of gill/body flukes perhaps?
<Not eggs... would be off the fish's body>
The fish has been treated with PraziPro, but only one round for 2 days. That was
a week ago.
Thank you for sharing your ideas! I'd like to get more specific with my
treatment protocol and your advice is much appreciated!
<Do try removing the blobs from the spines, scales, put under a cover slip with
a drop of water, and re-shoot and send. Thank you. Bob Fenner>
Re: Disease Identification with Photos 5/19/18
Oops! Sorry! I reformatted/resent the photos, but the video is only 3 seconds
and I can't get it condensed to less than 1.8MB. Hopefully the pictures are
enough for identification purposes! I thought that the
parasite might be Amyloodinium, but it's way too big!
<Yes; too big for any fish parasite I'm aware of>
The photos are only magnified 10x. Then I thought it might be the beginnings of
Lymphocystis from stress?
<Nah; not likely>
It isn't pear shaped like the photos of Cryptocaryon on WetWebMedia, so I'm
guessing not that.
Re: Disease Identification
Thank you for your input! I did prepare the fin clipping as a wet mount, so the
photos are taken with water supporting the body mucus blob.
It dried up within about 20mins of taking the photos and the blob shriveled to
about a quarter of its original size. The fish hasn’t shown any more of them, so
I’m unable to take another sample for you so far. I’ll send more photos of the
issue resurfaces. Thanks again!
<Thank you. B>
Re: Disease Identification 6/16/18
Hello Bob and crew!
I thought I'd give a follow-up email for our string (see below). My
purple tang did not show any further signs of the white spots through
quarantine. It is now living happily in my display tank and appears perfectly
healthy! It appears to have been environmental, just as Bob predicted, and my
guess is that it was due to sub-par water quality while doing the Tank Transfer
Method in quarantine.
Thanks for the advice! Add one more happy fish to the list of all those that you
<Thank you for your update. Cheers, Bob Fenner>
Scar/healing question 6/4/18
Just got a large red sea purple tang and he has a small scrap on his body that
healed a while ago but is noticeable. Was curious if fish tend to heal or if the
scars permanent? Here's a photo as well, know any plastic surgeons?
<Is the scar you're referring to the whitish spot twixt the dorsal and caudal?
This may remain or not.
Re: Scar/healing question 6/4/18
That was it, wasn't sure what you all at wet web had seen in your experiences so
I figured id ask. Guess I'll wait and see.
<IF not too deep (as in a gouge from a mechanical injury), chromatophores,
scales can/do grow back. Bob Fenner>
Please help me ID this as i have been through hell with my Purple
I am sorry to send you an email but i am at my wits end i have a
purple tang (Zebrasoma) and he is covered in these white blotches..
<Mmm; see something...>
See attached pictures, i treated for ich with copper and nothing changed
despite his tank mate (a PBT) being completely cleared of his spots this
made me question whether it was ich, i then kept him in hypo for 8 weeks and
got no improvement, so this in my mind is not velvet or Ich, i then treated
with malachite green as i thought this was bacterial still no joy, Any help
or advice would be greatly appreciated, would kill to chat to Bob Fenner
personally! My system is 110gal.
Thanks so much in advance!
Stressed Tang Owner
<Well; can't tell from looking without sampling, viewing under a
microscope... whether this is anything parasitic or not. Might well be just
stress marking/s. Need to know data re the history of water quality,
nutrition... Let's have you read here fro more background:
DO send along the "history" I've mentioned, better-resolved image... and ask
about at your LFS re they have a 'scope, can/will help you sample, look. Bob