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Posts posted by Leslie

  1. I sent the photos to several experts & it stumped all of them. One got the family right - Inachidae - but couldn't come up with a genus. I guess none of them has ever seen a freshly molted animal. So that really is a first.


    That's a real shame about the Seaway. Unfortunately it's a common attitude that "muck" is worthless. Deep sea trawling is destroying coral reefs thought to be as much as 10,000 years old & hosting 1,300 species of animals because they're in the middle of featureless mud that no-one cares about.....


  2. Oh my gosh.... the sponges in the video that you or someone touched? That sure looks like a empty sponge-covered carapace of the decorator crab Camposcia retusa, which makes me think that your little guy is a newly molted retusa. Hardly anyone ever sees them like that! He was just waiting for you to go away so he could start picking the sponges off his old molt & re-decorate his nice new shell.


    Here's an image of a specimen with the sponges removed from half the body - http://kanichang.web...cia-retusa.html

  3. Here's one opinion. From Jody Martin, the crustacea curator at my museum.

    "Interesting. The dorsally rounded and very setose body, coupled with the fact that the claws are small and that only 3 walking legs per side are visible, lead me to think that this is most likely a member of the family Homolodromiidae, and probably the genus Dicranodromia. It's a fascinating family, considered primitive by nearly all crab workers, and not much is known about it. The eyes of homolodromiids are sort of simple however, usually simply rounded on a stalk, and yet these eyes look more "beanshaped" than is true for that family. I'd like to see it, but I'm sure the specimen was not collected. Dicranodromia species do not get that large -- you mentioned a size of an adult hand -- so maybe this is the genus Homolodromia."

  4. Something's been bothering me about that thing all night. I finally had to get up & do some fact checking. There's only 1 family of spider with 2 eyes & they are attached directly to the body wall. Your little guy has stalked eyes which makes it a crab. Doh! I'll send the image to a couple of friends & see what they say. You could also try Gary Poore, crustacean expert at the Museum of Victoria and author of a book on marine decapod crustacea of Australia.

  5. That's a surprise - it's a real spider (or else a crab that really really looks like one, but there does seem to be a cephalothorax & an abdominal region). Not a sea spider which belong to the Pycnogonida. Real spiders can live underwater for at least a few hours, some for much longer - http://news.national...a-drowning.html


    To get an ID you'll need to google for Australian spiders experts & send the photo to them, sorry. Please let us know if you get a response.

  6. Hi Kaj -- Great capture (but then we've come to expect that of you!). Shrimp do get hit by a lot of different types of parasites including worms. I can't give you any specific information, only a link or two for general facts -




    Handbook of Shrimp Diseases - the National Sea Grant Library



    http://www.petshrimp...ss palaemonetes



    Incidentally, you're going to get a lot of hits on your bobbit video soon. The link was posted on our polychaete community forum.

  7. I doubt it. Besides, that a term I've never liked when applied to inverts. It really suggests that one species is actively copying the other which isn't the case. The exception might be octopuses, but I've always wondered if mimic octopuses raised in isolation from the animals they're supposed to be imitating would still assume the same shapes. I bet they would and that it's hard-wired into them.

  8. Too bad about your HDD!


    Well, I don't think it's a Paracaudina or another sea cucumber. Paracaudina species - especially young individuals - have translucent skin and it's easy to see the 5 muscle bands characteristic of holothuroids. They should be visible in an animal this size. I believe it's probably an acoel worm. They aren't noticed very much because of their small size. Until recently they were classified with flatworms but now they have their own phylum - Acoelomorpha.

  9. Judging by web images I think a lot of people get them confused. The commonly found IP Hyastenus have 2 prominent rostral spines. Some of them are decorators with sponge over the entire body & all legs; often the sponge over the 2 spines fuses into 1 club-shaped mass. Others don't use sponges & are fairly free of covering or just have hydroids or algae attached to the rostral spines. I would go with Schizophyrys (or something related) rather than Hyastenus for your animals.

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