Higher grade fish ID needed

Discussion in 'ID Needed' started by richardmatlock, 28 Apr 2011.

  1. richardmatlock

    richardmatlock

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    Hi all

    I caught a pair of these 4km up a river in the Kei 2 months ago. Both are thriving in one of my systems but I'm a bit embarrassed to admit that I am stumped as to what they are....

    [​IMG]
    [​IMG]

    Note the large mouth in the second pic

    Thanks in advance.
     
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  3. Johan van Aardt

    Johan van Aardt I love marines [R.I.P.]

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    some sort of dart fish..... with that mouth
     
  4. 459b

    459b Moderator MASA Contributor

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    What was the salinity that far up the river?
     
  5. richardmatlock

    richardmatlock Thread Starter

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    Normal, caught them in between normal tropicals. Not a FW species.
     
  6. richardmatlock

    richardmatlock Thread Starter

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    I've already checked all known dartfish spp from SA and Moz and none of them. I've caught the scissor-tail before (Ptereleotris evides), and they act very similar to John and Jane Doe above. Looking at pics of the 51 spp of dartfish found globally, looks similar to some of them...
    Fish Identification
     
    Last edited: 28 Apr 2011
  7. SteveZi

    SteveZi

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    Hi Richard,
    very cool specimens! - I think they are Parioglossus dotui
    kind regards
    [​IMG]
     
  8. richardmatlock

    richardmatlock Thread Starter

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    I eyeballed the P. dutui a while ago and don't thing so, they have only been found in Japan, Korea Rep, New Caledonia and the Ryukyu Is. Bit of a big swim, also their max size is 4cm and these are almost double that already.... more likely a related/new spp...
     
    Last edited: 28 Apr 2011
  9. Nsteyn

    Nsteyn

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    Or released in our waters by some naughty aquarium keeper :p
     
  10. richardmatlock

    richardmatlock Thread Starter

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    ...and stretched by same naught aquarium keeper deep in the Kei....
     
  11. SteveZi

    SteveZi

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    Hi Richard,
    Size is never a truly reliable indicator - the "limit" is set by the biggest found thusfar! Says nothing about the true possible one...
    as far as distribution data, I have found for a lot of our local species, this is not always very accurate as can be expected.
    Have you considered approaching someone at SAIAB with your find?
    I think it is definitely worth it - even prof Charlie Griffiths at UCT would be interested as he does research on alien marine species and is very approachable.
    Keep us updated!

     
  12. richardmatlock

    richardmatlock Thread Starter

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    Thanks Steve, I've worked for SAIAB in the past and am a regular there when it comes to rare fish (also spent my last year of post grad there with my own office and all). The capture record set that I've been using is the globally accepted "Norm" and you must remember that there is a HUGE difference between range extension information updates and new records with regards to fish distribution. I did my last thesis on range updates of western Indian ocean reef fish, and know probably more than anyone how out of date they are. Though one must remember that ranges are dynamic and do fluctuate.What I mean is, if this is P dutui, then he is about 13000km out of his known range, the size issue is immaterial. Regardless, thanks for the assist and will keep you updated.
     
    Last edited: 28 Apr 2011
  13. SteveZi

    SteveZi

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    Richard, I'm going to go out on a limb here and say I think you seem to be adequately equipped to handle this identification!
    I do appreciate the fact that you have posted your specimens here for us to ponder.
     
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  14. richardmatlock

    richardmatlock Thread Starter

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    Yup, second opinions are always welcome.
     
  15. Yuri

    Yuri

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    Why do you not put it up on reef central
     
  16. richardmatlock

    richardmatlock Thread Starter

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    Definitely an idea, though I think that I have all the info that I need a.t.m., also I only subscribe to SA sites - only interested in local goings on.
     
  17. brentv

    brentv

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    Nice catch Richard, good eye to pic those ones up!
    Were the living in gravel/sand type substrate, or was it alreadythe dark mud?

    I chased one of these buggers P. Zebra in the Kei for about an hour, before he just disapeared into thin air.... uuuHHH Water:blush:

    [​IMG]

    I like the ones you caught...
    Guess we both are in the same boat on Fish Identification now:thumbup:
    Definately exciting times!
     
  18. richardmatlock

    richardmatlock Thread Starter

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    I've caught some of these BASTARDS in the kei and up in Moz, they're still not as difficult to catch as the P. evides [​IMG] but definitely difficult. You ever see any fire gobies? (N. magnifica [​IMG] Caught them south to Tshani in the Transkei as well.
     
  19. brentv

    brentv

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    Never seen Fire Gobies down in the shallows that side! Get them up this side but normally around 30M, you get them snorkelling in the estuaries?
     
  20. richardmatlock

    richardmatlock Thread Starter

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    Got a couple in rockpools, never in estuaries.
     
  21. SteveZi

    SteveZi

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    Richard, did you make any progress with ID-ing these gobies?
    I looked at your photos again and that black blotch at the tail looks more vertical than that of P.dutui which is more horizontal.
    There is one (P.rainfordi I think) with a similar blotch, but then again - the distribution issue...
     
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