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Leslie

Critter Expert
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Posts posted by Leslie


  1. Hi Polly -- Not a fireworm but a scaleworm in the family Acoetidae. Unfortunately I can't give you a species name. Scientific literature is based on preserved specimens and we don't know what the different species look like when they're alive, or if they can even be told apart when they're alive. Great photo though!


  2. Welcome to Wet Pixel, Macel. That's an interesting find. I haven't seen this before & while I suspect you're right I'm really not sure. Why don't you ask for assistance at www.JellyWatch.org or better yet, their Facebook page http://www.facebook.com/jellywatch The two sites are run by jelly specialist Steven Haddock & others at the Monterey Bay Aquarium Research Institute. A post on Facebook should get you a rapid response. Please let us know what you find out.


  3. Welcome to Wetpixel-- You've come to the right place since polychaetes are my speciality. However, it's not really possible to definitely ID worms based on photos like these. I can give you family & sometimes genus but if you need species level ids contact me personally.

    1 - Family Goniadidae, genus Goniada

    2 - Family Onuphidae, genus Diopatra if the gills are spiralled filaments

    3 - Family Terebellidae, genus Pista?

    4 - Family Flabelligeridae, genus Brada, maybe B. pluribranchiata

    5 - Family Terebellidae

    6 - maybe family Eunicidae - only a median fragment is showing

    7 - Family Capitellidae

    8 - Fanily Ampharetidae


  4. It's normal & you're probably right - we usually can't see organs unless the body is transparent. The ovotestis are part of the reproductive system in hermaphrodites. They contain follicles which produce eggs & sperm. Some species have a lot of follicles & large ovotestis, some have only a few & small ovotestis. The number, shape, arrangement, & proportion of egg-producing to sperm-producing follicles are some of the characters that nudibranch experts use to classify & identify them.


  5. Hi Kaj -- Another fascinating capture! In a polychaete those balls would be eggs loose in the body cavity but they're way too big for P. poimdimei eggs. I wrote to nudi expert Dave Behrens who wrote to another specialist Terry Gosliner. Here's Terry's answer "It is definitely P. poindimei and I think they are ovotestis follicles that have somehow become dislodged. The animal has lost a lot of cerata and had an encounter with some predator. I suspect they somehow got dislodged during that interaction."


  6. Wrong phylum, Polly, although I can see where the segmentation across the back can be confusing. It's a sphaeromatid isopod. You can see some of the legs on the right side of the body; the head is facing down.


  7. Chuck Raabe's site - the one Richard linked to - is quite good. Chuck's a salt water aquarist & invert fanatic who lives in the Philippines & collects directly from the reef near his house. He sends his shrimps to Alexander Bruce, the top IP expert, for id & updates the taxonomy whenever something new comes out.


  8. I've no idea about copepod size. Why don't you write Michael Schroedl, an expert on both nudibranchs & their copepod parasites? schroedl@zi.biologie.uni-muenchen.de

     

    The gill damage might be a coincidence. If I saw that kind of damage without the egg sacs I would guess that a predator took a bite out of the gills and they are now regrowing.


  9. Steve Haddock, jelly expert at the Monterey Bay Aquarium Research Institute has revised the identification - it's the other species of Deepstaria, D. reticulum. He's posted this video

    with great images of both species plus other deep sea jellies.

     

    Check out some of the other deep sea videos on the MBARI youtube site as well. Great stuff!


  10. Jelly, Deepstaria enigmatica. There was a nice blog post about it on Deep Sea News, May 9, explaining the various body parts & history - http://deepseanews.com/

    and pics of one in normal position on the facebook jelly watch page -

    https://www.facebook.com/photo.php?fbid=101...e=1&theater

     

    Incidentally, if you don't know it already, Deep Sea News is a fantastic marine biology blog. Even when I'm overwhelmed by stuff & drop everything else I still check it on a daily basis. Enjoy!


  11. Hi Sergio --

     

    the first is the lion's mane nudibranch, Mellibe leonina. It looks like an older animal with curious black dots. I wonder if those are amphipods or a type of parasite?

     

    the other is the detached "stem" portion of the siphonophore Praya. complete animals have a big transparent bell on one end.

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