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Leslie

Critter Expert
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Posts posted by Leslie


  1. I just did a websearch - these guys are very cool! Apparently some species are "farmers" who collect & store seagrass & algae within their burrows in special chambers. As the seagrass decays the shrimp eat it. Judging by its burrow construction & behavior it might be Corallianassa longiventris which is widespread in the Gulf of Mexico & the Caribbean. Researchers have reported that it's easy to lure individuals of this species partially out of their burrrows by holding blades just out of their reach.


  2. They're thalassinidean shrimp, relatives of ghost shrimp & mud shrimp. Most likely in the family Callianassidae, possibly genus Corallianassa. They form really extensive burrows and are nearly impossible to catach. I'm amazed you were able to grab an image before the critter disappeared down it's hole. Paul Osmond has pictures of the same species on www.deepseaimages.com site but it's incorrectly identified as a hermit crab if I remember right.


  3. Hi Jean - As a certified wormologist I can tell you that I haven't got a clue. It's definitely not a lugworm and it sure doesn't look like a flatworm. It's not segmented so it's not a polychaete. Do you have any other pictures? Can you tell me anything about it's behavior?

    Leslie


  4. Mike - using Randall, Allen & Steene the blenny does match Nannosalarias nativitatis (throatspot blenny) and the cardinal seems to be Apogon doderleini (Doderlein's cardinalfish). All of the pictures I've found of Plectroglyphidodon lacrymatus show dark fish with blue spots and none of the description mention an alternative color phase.


  5. :):):)

    Love the pics! You really caught the jaws & antennae well. Did you use some bait to keep it out of it's burrow?

     

    Funny story - where'd you get it? - but kinda of unlikely as males & females never meet. Like coral, they shed their eggs & sperm into the water. The eggs & sperm come into contact, fertilization occurs, the larvae develop in the water, & eventually settle back on the bottom. These are called bobbitts because some smart guy thought the open jaws look like scissors. :blink::huh:

     

    Would you mind if I downloaded your pics for my research files?

    Cheers, Leslie


  6. Hi Marli -- Here's a best guess by a real 'pod person, Don Cadien...

     

    "Just a guess, but the available detail in the photo suggests Hyperia

    medusarum (O. Muller 1776), or Hyperia galba (Montagu 1815). Both species are known to occur on a variety of medusae, and are sufficiently similar in morphology and behavior that they cannot be separated based on evidence in the photo. At first I was leaning towards Vibilia, but the first antenna is not right for that genus.

     

    By the way, if they are indeed Hyperia this isn't a joy-ride. The amphipods

    feed on the tissues of the medusae."


  7. Sorry, Matt. Will & Anthony are right on this one: the polyps are really polyps, some kind of octocoral as there are 8 branches. The tentacles in cukes usually come in multiples of 5 and there would be noticeable muscle bands along the body.

    I agree, nice photos. Will, can you get a decent enlargement of the shrimp on the polyps? I'm curious about them. Thanks, Leslie


  8. I don't know if it's species or depth related. How deep were the MOCNESS samples? the ones I've collected using a night light from the Friday Harbor Lab boat dock were like Marli's & had big black eyes while other animals from midwater trawls had transparent eyes. I have no idea if they were the same species or not.

     

    I like to think that the model for the Alien's eversible proboscis was a polychaete. :blink:


  9. The mood of the desk clerk is definitely the most important factor. In January I went to Fiji on Air New Zealand for a field survey. One person in our group annoyed the clerk by asking for a "research" discount for extra luggage which I had gotten in the past from other airlines. The clerk weighed every piece including all carry ons, made us re-distribute items to get the weight right, had us sign quit claims for potential loss, & in general made life pretty miserable. I had 3 carry-ons, 2 bags & 3 crates so I got hit the worse. Meanwhile other clerks were letting other passengers pass through with grossly overweight bags & oversize carry ons. Travel is only going to get worse as several airlines have decreased the maximum weight for international flight from 70 pounds per bag to 55 pounds. :)


  10. Nice shot!! And look how tenderly one appendage is caressing the other - it must be true slug love!! :)

     

    Ugliness is in the eye of the beholder and you're talking to someone who thinks wart hogs, woebegongs, & stonefish are absolutely adorable......


  11. I've been looking through my books & on the web and can't really find a good match for this or the previous one you posted. this one might possibly be Galathea australiensis as you suggested but I don't know the amount of variation within the species. That first one is just spectacular - it's enough to start an upsurge in UW tourism by divers wanting to photograph it. But it's not in my books. Have you sent it to the crustacean departments at either the Museum in Victoria or the Australian Museum in Sydney? Or to Dave Harasti who's usually lurking around wetpixel somewhere? I could also send the pics to a friend who works on the family if you don't mind.

    Leslie


  12. Here's the reply I got from Lindsay Groves, who is the mollusc collection manager here at NHMLAC and specializes in cowries & ovulids:

    "I would concur with the Prosimnia piriei identification based mostly on the illustration in Coleman (2003:93). An illustration of P. semperi in Okutani (2000) [Marine mollusks in Japan] seems to agree with the Gosliner & others id and even lists the gorgonian host as Melithaea sp. as well. Liltved (1989:125) [Cowries and their relatives of southern Africa] lists P. semperi as living on melithaeid gorgonians, too. Wu & others (1990:275, fig. 2) [Three ovulids (Gastropoda: Ovulidae) from southern Taiwan] shows P semperi living on Mopsella aurantia (Family Melithaeidae). Unfortunately the holotype of P. piriei was collected as an empty shell on a beach amongst dead gorgonians of unknown affinity. Never-the-less, your illustration best matches P. piriei. Hope this information helps."

     

    that's probably as good an id as we can get without the specimen.

    Cheers, leslie

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