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Unknown Goby


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#1 JimG

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Posted 11 December 2012 - 08:43 AM

Taken in Cebu, Philippines. Looks like it should be in the genus Trimma but can't find a match

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#2 grivai

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Posted 28 December 2012 - 10:27 PM

Trimma yanoi...?

#3 JimG

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Posted 29 December 2012 - 07:44 AM

Thanks Grivai. I have tried to find info about T.yanoi but am really struggling. Can you point me anywhere please?

Trimma sheppardi is another possible but again there is little to go on.

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#4 AllisonFinch

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Posted 29 December 2012 - 10:29 AM

Google is your friend....

http://www.kahaku.go...uzuki_Senou.pdf

#5 JimG

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Posted 30 December 2012 - 02:50 AM

Thanks Alison. Yes I had read that closely; its about the only thing I could find. I don't think it takes me much further as the colour pattern shown is not quite the same and I know that's never a good guide anyway. The genus seems not to be well described generally and to differntiate between very similar fish seems to depend on lots of detailed measurements, scale counts etc. I guess I will never know conclusively unless I can get in touch with one of the expert mentioned in that paper.

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#6 JimG

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Posted 10 July 2013 - 12:05 AM

Got it at last! For information, it is Trimma haimassum, the Blood-spot Pygmy Goby. Confirmed by Dr. Rick Winterbottom, Ontario Museum who described and named this species two years ago. He also kindly sent me a very detailed paper about this and five other similar species of Trimma he described at the same time.

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#7 Glasseye Snapper

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Posted 10 July 2013 - 04:45 PM

Hi Jim,

 

I'm not going to argue with Rick but if he is right than Reef Fishes of the East Indies must be wrong. Their picture is definately much more congruent with T. yanoi, and not really with T. haimassum, which they do include in the book. For T. haimassum they mention "pale yellowish brown to bluish grey with purplish stripe under eye extending onto opercle; lavender stripes across upper edge of orbital rim, and dappled pattern of lavender markings on snout. Caves and ledges on steep outer reef slopes in 15-70m." I would not consider it a good match with your image at all. In contrast, RFEI's T. yanoi resembles your image quite well, just with less constrast in the spots but that is not unusual. The majority of Trimma species are described by Rick so I would stick with his conclusion, just surprised about inconsistency.

 

Bart


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