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Leslie

Critter Expert
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Posts posted by Leslie


  1. I'm 95% sure it's Caphyra but I admit I jumped the gun on species by assuming that there were spots on the back. Caphyra laevis is also a Xenia commensal & ranges from white with lots of brown markings to all white so that's another possibility. There's somewhere between 15 & 20 species in the genus; many of them are octocoral associates. As usual it takes a specimen in hand to accurately id something.

     

    Drew -- please note that I am NOT asking for specimens, just telling it like it is! :clapping:


  2. Unusual. First, because Lybia tesselata are never covered with floc with that - they don't have the hairs that decorator crabs use to attach their camouflague. Second, the color pattern - granted, it's very hard to see - seems wrong. There are several species in the same genus & in other genera that also carry anemones. Do you have other images of it Maxtom? It would be very useful to see it from different angles.

     

    Found it - Lybia caestifera. See http://www.izuzuki.com/Zukan/Other/Ka2/himeKK2.html


  3. Gotta remember that a lot of the distinguishing characters for many animals are internal or microscopic. With anemones for example, the arrangement of the internal membranes is often crucial at both species & generic level, also the structure of the nematocysts. Sometimes there's just no way to identify them from images.


  4. I just don't know Nick. The image labelled Percnon planissimum in "Shrimps & Crabs of Hachijo Island" by Kato & Okuno has yellow eyes & the yellow stripe down the legs. That's a pretty reliable publication & the one I followed. Looking on the web there's several different colorations under that name - like this one http://decapoda.free.fr/illustration.php?n=4&sp=593 So far I haven't been able to find a reliable source which details the coloration of the various species.


  5. Would that one time in 6 YEARS have been us by chance Leslie? Just got back on island yesterday afternoon, Spent today settling in and getting the camera ready to start searching for the unidentified tomorrow..

    all the best. Cindy

     

    Yup, although I forgot Ellen Muller, shame on me & my bad memory. In both cases Cindy & Ellen did all the right things, hooked up with a specialist for advice, got permits, etc. The white footed shrimp isn't new (although the associated worms might be) but the information Cindy & her group brought in adds quite a bit to our knowledge of the species & will be eventually published. Ellen's beautiful nudibranch was undescribed & she got to choose the species name which is a combination of Bonaire & Ellen - Trapania bonellenaea http://www.pbase.com/imagine/trapania


  6. Now don't start giving people ideas. The airline regulations are tough enough without formaldehyde tottin' fame seekers going nuts on dive sites :)

     

    I wouldn't worry about it Drew - too many coral huggers on the boards. When I first joined I hoped people would collect (legally) but that's happened once in 6 years. Nowadays I mention the need for specimens just to emphasize that pictures alone - even great pictures - aren't enough for an accurate id.

     

    Besides, preserved specimens can always be mailed! :drink:

     

    :D


  7. Could be, David. From what my shrimp friends have told me about commensals every species of host could have a different set of obligate commensals. So far there's only 2 described species of Izucaris - masudai which has been reported from Japan, Philippines, Indonesia, PNG area and I. crosnieri which is only known from French Polynesia. The anemone's correct id is a whole other question. Doing a little more research I see that Nemanthus & a couple of other genera are so similar they have to be dissected to be correctly identified.

     

    The bottom line, as usual, is that to figure out if something is really new specimens have to be collected & sent to a specialist.


  8. I'm betting the host is the tiger night anemone Nemanthus nitidius. In which case give my sympathy to Wayan, David. It's fairly well known but the camouflage coloration is so good most people never see it. The species name is Izucaris masudai, described from Japan and reported (or at least photographed) through Papua New Guinea & elsewhere. The color pattern always matches the host.


  9. Big old nasty isopod. Can't identify it from the photo but the most typical parasites with that look are in the genera Anilocra and Nerocila. Some species attach for a nice hot blood meal then drop off, others stay attached, & yet other species attach then eat their way into the fish.


  10. Yeah but my sample was much older than his. I'll live in ignorance since I have a name and no one knows any better! :) I shot my example in Bali.

    Well if you put it that way, I can't argue with you about subjective appraisals of cuteness. I don't want to be called cute anyways, too teenagey. :good: I just never thought you were one of those "chicks" who liked exotic foreign men. :D

     

    Older? The critters in the pictures look so similar you might have shot the same one! Oh well, ignorance is bliss, I suppose..... :)

     

    Exotic foreign men.... be still my beating teenage heart! It was always my ambition to end up living on another continent on one of them. Somehow I failed completely, so sad. :(


  11. It is in all probability a Gymnothorax Javanicus. If you pixel peep at 200%, you'll see black spots on the top and bottom of the body. I don't have my pics with me so I can't post a sample.

    My post from July:

    http://wetpixel.com/forums/index.php?showtopic=31498

     

    Leslie, how come you didn't ask Ben for me and I had to go scout for an answer myself? :good:

     

    A) Pigmentation of pelagic larvae is usually much different than the adult color so that's not a good clue. I'd stick with what Ben said.

     

    B) Tunc is cuter

     

    C) Ben didn't join until late August.

     

    :)


  12. I asked Ben (wazungu) to comment on this as he works on larval fish. This was his reply:

     

    well, the problem is that it is from Lembeh, where probably 2,000 species of reef fish reside (!), and the eel larvae are a huge problem- there are many families of eels that all look pretty similar, and even the adults are difficult to assign to family, let alone genus and species. The important characters for adults are subtle enough- the characters for larvae are literally counting the number of muscle segments and hoping for the best. So, the bottom line, can't even say what family it is (and "morays" covers many families in addition to the strict Muraenidae). Amazing photo though...

     

    Thanks for your help Ben!


  13. Marli, everytime I show the crab experts a picture like this & ask for an id they pretty much just laugh. It's true that some crabs are consistent enough in their choice of attachments & shape/ or leg color such that they can be reliably id'ed but only a few. Or should I say that not enough is known about decoration choice & live appearance to be able to do it for more than a few? That's probably true too. sorry......

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