Attack of the "giant bristleworm."

Ninong

Team RC
I received the February/March issue of Coral magazine today and I was reading Daniel Knop's editorial when I noticed a reference to an article on page 60 that Knop says will serve as a "worming." It's a play on words with "warning." Naturally I stopped reading the editorial and went straight to page 60 to see what this mysterious "worming" was all about.

On page 60, I found a photograph of a huge (52" long x 1" thick) "bristleworm." The accompanying article is titled, "Size matters, or The Giant Bristleworm." The author, Karlheinz Klein, relates his experience with disappearing corallimorpharians and Xenia and even "some smaller fish and shrimp." At first he suspected a really large crab but further investigation revealed the culprit to be a really large "bristleworm." See scary photo!

That's pretty much it. One large photo of an unidentified "bristleworm" and two pages of text but no attempt at identification. The thrust of the article, especially with Knop's reference to it, is that "bristleworms" are a potential threat to the peace and tranquility of your reef aquarium.

It's really unfortunate that a magazine of this excellent caliber would publish something like this without any attempt to identify the worm in question or say anything at all to dispell the impression that all bristleworms might grow this large and be this destructive. Actually it's unfortunate that they even used the term "bristleworm" at all rather than the animal's family name. I assume it's a eunicid of some sort but perhaps one of you polychaete experts reading this who happens to have the latest copy of Coral magazine can take a look at page 60 and tell me what you think it is.
 
Wish I did, Ninong. You're probably right about it being an eunicid. Did the image sow 5 head tentacles?
 
Leslie,

There are two large photographs. One of them shows the entire worm and the other one shows just the first 30 cm or so, including the head. However, the positioning of the antennae on the head does not match the diagrams or photographs that I have found online for eunicids.

There is a large vertical antenna centered in the top of the head that appears to be a little thicker than any of the other antennae. There are two forward antennae that are just as long as the vertical antenna but not quite as thick. These two antennae protrude forward forming a 'V'. There appear to be two slightly shorter lateral antennae, one on each side, located slightly behind the large centrally located vertical antenna. So there appear to be a total of five antennae but they do not appear to be coming out of the same area of the head like the diagrams I have seen online and in Ron Shimek's photo of "Max."

The worm appears to be dark brown, at least on its dorsal surface, with several bright reddish 'dots' running in a line down the middle of its back.

Unfortunately, even the second photograph that shows a better view of the head, is not really a close-up of the head and it's taken looking directly down on the worm from above. It may be enough for someone familiar with polychaetes to identifiy it down to genus. I'm just taking a wild guess when I say I think it might be in the family Eucinidae.

:D
 
Leslie,

I'm not sure. I really can't say that it looks exactly like any of those in Gallery 4. As you know, someone else who has seen the photos has already identified it down to genus: Eunice. That's fine as far as I'm concerned. I just wish the magazine had bothered to identify it at least to family, but they chose to call it a "giant bristleworm" and warn that "size matters."

Nevertheless, it's a fine magazine.

:D

P.S. -- I just realized I have a typo in one of my posts above: I misspelled Eunicidae. :o
 
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