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Leslie

Critter Expert
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Everything posted by Leslie

  1. Poor little guy, so awkward looking out of the water. Ranina ranina, called the frog crab or spanner crab. It's actually pretty common & is commercially fished in Australia & around the IP.
  2. That's why they pay me the big bucks! Oh wait, they don't.....
  3. I'm not sure about this one. To use the classic taxonomist's reply, I need to see a specimen. It could be an echiuroid but probably not. It could be a sipunc but not Sipunculus. It might be a sea cucumber but there are too many muscle bands. It might be a burrowing anemone. Hmmmm... the gut coils look more like a Sipuncula. So I'll stick with that until someone corrects me & then I'll swear that's really what I was thinking..... ;-D
  4. Nope, that's an sipunculan worm, phylum Sipuncula. That particular pattern of skin reticulation is typical of the genus Sipunculus. In echiuroids the proboscis is attached to the outside of the body & cannot be withdrawn. Sipuncs have what's called an introvert - the feeding structure is held within the body until the animal wants to feed and then it is extended outwards. There's a ring of tentacles at the end of the introvert which surrounds the mouth & which the animal uses to pick up particles. This picture shows an animal with the introvert sucked in & an inset with the introvert out. http://www.flickr.com/photos/artour_a/331307537/sizes/l/
  5. That's the detached proboscis of a spoon worm, phylum Echiura. Normally the worm stays hidden in it's burrow or rock crevice while the proboscis is extended to bring food particles back to the mouth. It easily breaks off & continues to move to distract predators while the worm retreats further back in it's home. Another one will soon be regrown. http://www.flickr.com/photos/wildsingapore/3899554269/
  6. Hi Marcelo -- Sammy De Grave sent me some id comments about your shrimp. The first one is a Sicyonia. They're common sand-dwellers, often found in huge numbers, and the large ones are very very tasty (that's my personal observation ). Second could be either Stenopus spinosus with really big range extension or a recently found undescribed one which has the same coloration as spinosus. No way to know without a specimen in hand. Cheers, Leslie
  7. You're right.... I was so pleased to have found something similar that I didn't look closely enough. Can you ever forgive me for attempting to lead you astray?
  8. Hi Brian -- I couldn't find a named species. It looks very similar to this one which was left as Pseudoceros sp http://www.rzuser.uni-heidelberg.de/~bu6/flat0246.html
  9. Looks like a reasonable id - http://jellieszone.com/geryonia.htm
  10. It's probably easiest to find them by looking for their hosts. Idiomysis tsurnamli - the Red Sea species - is a commensal on certain anemones & the upside down jellyfish Cassiopea. As they buzz they're feeding on organics in the mucus that these cnidarians are constantly producing & shedding. In one recent study 65% of the Cassiopea in a sand bed/seagrass meadow had them.
  11. I think so too. It has the same color banding as Jo's from the Red Sea but I've no idea if they are the same species. Only four have been described so far - one from Japan http://goinunder.exblog.jp/8422760/ one from Mozambique, one from India which has shown up in Australia, and one from the Red Sea.
  12. That's a type of brown algae called Dictyota. Many species in the same family Dictyotales have this type of blue iridescence. Once the angle of the light changes or the algae is taken out of water the iridescence vanishes, allowing the typical yellowish-brown color to show. Here's an example from the Caribbean - Dictyota humifusa - http://www.stri.org/english/about_stri/med..._66115-situ.jpg
  13. Looks like it could be but then what's it doing outside of it's clam? Conchodytes tridacnae is an obligate commensal of giant clams. The other one is another obligate commensal by the name of Pontonia katoi. Not too many good photos of either of these and these are lovely.
  14. It's in the Humann-DeLoach Carib critter book as Paractaea rufopunctata but true rufopunctata seem to be restricted to the Indo-Pacific. Different authors classify the caribbean one as subspecies Paractaea rufopunctata nodosa or as a separate species Paractaeae nodosa. http://www.flickr.com/photos/artour_a/8411...57619715477653/ The pink areas on the back are just bumps. Without a diver's bright light to show them off the bumps make these crabs look like bits of rubble.
  15. That's actually an easy one Anne. It's one of the bones underlying the plastron, the ventral surface of a turtle's shell. What I don't know is what kind of turtle..... http://www.jaxshells.org/919za.htm http://chestofbooks.com/animals/Manual-Of-...I-Chelonia.html
  16. They do look like bees, don't they? They're small mysid crustaceans called Idiomysis tsurnamali. Only found in the Red Sea & surrounding areas, and always a commensal on sea anemones & the upside-down jellyfish Cassiopea. Unfortunately the only website that has close up images of them - dafni.com - is currently infected by malware so I don't advise going there. Fortunately, here on Wetpixel we have two threads with great images of similar species showing the odd body shape. Idiomysis is fairly unique because of the chunky body & thin curled tail. Most mysids are sleek and elongated, much more shrimp-like. You did a great job - especially in the last third of the video - focusing on individuals. http://wetpixel.com/forums/index.php?showtopic=29478 http://wetpixel.com/forums/index.php?showtopic=23549
  17. Hi Jack --Someday.... but your scheduler has never contacted me so who knows when.
  18. I'm sure Bill would appreciate any reasonable suggestions & more to the point, actual help in keeping the forum going. SSF is an incredibly valuable resource for all of us and it would be a great shame if it would be converted to a static database. I can't think of any site which has its wealth of diver/beachgoer's/academic/aquarist observations backed by good photography and Bill's umpteen years of experience - especially Bill! Unlike the usual academic taxonomist who isn't in the least interested in what Joe Diver has to say Bill has always appreciated what thousands of pairs of keen eyes all looking for tiny bits of color can contribute to science. I've joined others in urging Bill to set up some way in which we can contribute monetarily. It would be a good way to say "thank you" for all the help we've received. Even if people didn't know it existed before today they've benefited from the SSF. That's where I, Marli, and many of the others who chime in with IDs for your photos get our information. Think about it - how many of us have spent hundreds of dollars on guide books? Make that thousands for some people. And certainly thousands for the gear to take all those nudi photos needing IDs! We can certainly afford to send Bill a few bucks to express our gratitude and help keep the Forum going.
  19. Hi Jeff - I'm pretty sure yours is Phycocaris simulans. The color seems to be quite variable. TisTam - here's what Sammy De Grave of the Oxford University Museum had to say about yours: "Its too small to tell if it could be a Phycocaris or a Neostylodactylus, both have that characteristic posture. If colour is anything to go by (which I do not know for certain), then yes maybe its a Phycocaris. Neither of them are known from the Red Sea"
  20. I wonder if it's a juvenile Phycocaris simulans - the hairy crook-back shrimp - which doesn't have as much hair as the adult. I'll have to send it to my shrimp guru for a proper id. Meanwhile, you can check on simulans by looking at this old Wetpixel thread http://wetpixel.com/forums/index.php?showtopic=19379
  21. Yup, sea slug although not a nudibranch. It's a shelled cephalaspidean called Haminoea cyanomarginata. Cute little thing.
  22. That's a good picture for id! In "Nudibranchs of the World" by Debelius & Kuiter this is listed as Hypselodoris cf maculosa 1. The "cf" means it's similar to but not really the same as maculosa and the "1" means that it is one of several color forms. It can be distinguished from the true H. maculosa by the solid orange margin; in H. maculosa the margin has small white spots. It might be found under another name in other nudi books.
  23. Hi Jack - Welcome to Wetpixel. I think these are more likely to belong to Kellet's whelk, Kelletia kelletii. Take a look at these images http://www.divebums.com/main.html Incidentally, John Moore's divebums.com and Clinton Bauder's the Metridium Fields are two excellent sources of accurately id'ed images for southern & Central California. http://www.metridium.com/
  24. Cool! that's a particular favorite of mine. It's a polychaete genus called Amblyosyllis. The curly-q's are dorsal cirri, one pair per segment. They appear to be sponge symbionts but whether they feed on the sponge or not I don't know. Ellen Muller's got a good pic of another species in the genus. This one has it's dorsal cirri mostly uncurled.
  25. Hi Kay - You're in luck. thanks to some of our members we have a name for this little guy - Periclimenes harringtoni. You can read all about it http://wetpixel.com/forums/index.php?showt...mp+touch+me+not Cheers, Leslie
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