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killer shrimp

killer shrimp
Photo Information
Copyright: Michal Grabowski (cedryk) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 967 W: 50 N: 1722] (5270)
Genre: Animals
Medium: Color
Date Taken: 2007-10-17
Categories: Crustacia
Camera: Canon 350D, Sigma 70mm F2.8 EX DG Macro, @ ISO 200, Hoya UV Filter
Exposure: f/16, 1/200 seconds
Details: Tripod: Yes
Map: [view]
Photo Version: Original Version
Date Submitted: 2007-12-26 19:02
Viewed: 6926
Points: 34
[Note Guidelines] Photographer's Note
Dear Friends,
Again I had some busy months in my life preventing me from regular posting to TN. However, I hope you still haven't forget me. So just to make sure you haven't, today I want to show you an animal very important for my professional life. It is:

Dikerogammarus villosus
- killer shrimp
Family: Pontogammaridae
Order: Amphipoda

Why this animal is so important for me?
It's an invasive species in European rivers and lakes, that has come during just last decades from the Ponto-Caspian region (Black & Caspian Sea lagoons). It conquered most of the large European rivers: Danube, Rhine, Rhone, Main, Oder etc.

Altought not that big (up to 3cm long), it is a very effective and ferrocious predator killing many other invertebrates and even fish fry in colonised rivers.

Most of my time at work I devote to track this (and related) species and trying to understand, how and why they are such good invaders and what we can do to prevent it from further spread.

This fall, with my colleague we found it in the Vistula, the largest river in Poland. This is one of the individuals we caught, photographed alive.

And last but not least:

Argus, cataclysta, Alex99, extramundi, dejo, red45, Maite, marhowie, parvulescubio, cicindela, horia, meyerd has marked this note useful
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ThreadThread Starter Messages Updated
To parvulescubio: Hey!cedryk 1 01-03 11:22
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Critiques [Translate]

hello michal,
nice capture, the image is sharp with good details, liked the lighting, composition and the non distracting bg,
tfs & regards
wish you a happy new year 2008

  • Great 
  • Ric Silver Note Writer [C: 4 W: 0 N: 20] (146)
  • [2007-12-27 0:05]

Nice and interesting photo Michal.
Well documented.

  • Great 
  • Argus Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5038 W: 260 N: 15594] (50626)
  • [2007-12-27 2:11]

Hello Michal,
I hope you had a good Christmas,
Though this is a laboratory-type of photograph it is sharp and well presented to give TN members an interesting and important contribution showing an invasive species of freshwater shrimp. One wonders how it will effect the ecology and food chain of our European rivers and how other creatures will respond to the initial impact. If it is an invader of the major rivers of Europe, I wonder how it will effect the small tributaries and how small freshwater species like Gammarus will be affected in the long term?
Interesting work you are doing, Michal.
I wish you a happy and successful New year1

  • Great 
  • joey Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1739 W: 224 N: 6872] (24909)
  • [2007-12-27 3:33]

Hi Michal,
this is a really great shot of this little critter!
The detail in the body is amazing!
The image is very sharp and has excellent clarity.
Great colours and perfect lighting.
Good composition.
Well done!
I hope you had a great Christmas and have a Happy 2008 :)

Czesc Misiu
Zwierzak jes piekny. Widac swietnie kolory, wzorki i wszystki przydatki Bardzo fajna fotka super ostra a w dodatku bardzo niecodzienny obiekt na TN

  • Great 
  • Alex99 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4072 W: 133 N: 7096] (23735)
  • [2007-12-27 11:10]

Hi Michal.
Thank you for your kind greetings and amazing picture. Of course we remember your and were waiting for you here.

My best wishes to you in coming New Year. Brilliant reproduction of the wonderful creature. Sharpness is razor, lighting is wonderful. Composition and framing are the best. Bravo.

The same wishes for you Michal, hope you succeed in getting to understand this beast better.
The photo is really beautiful, incredibly detailed and perfectly exposed. Beautiful, really.
Thanks and regards, Felipe.

  • Great 
  • dejo Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 344 W: 51 N: 520] (2242)
  • [2007-12-27 12:51]

Hi Michal,
macro is very good, sharp and with great colors
thanks for the information about this amphipod, I did't know that, interestin work and great presentation
best wishes

Hej Michal,
Ja tez wpadam tylko na chwile :-) Szkoda ze krucho u ciebie z czasem, ale ja to niestety doskonale rozumiem :-(

Najlepsze zyczenia na Nowy Rok! Niech przyniesie jeszcze wiecej swietnych zdjec i pelno wolnego czasu!


  • Great 
  • red45 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2636 W: 74 N: 9091] (31094)
  • [2007-12-31 4:37]

Czesc Michal!

Milo cie widziec ponownie i to z takim zdjeciem! Techniczna perfekcja, a i temat bliski memu sercu :-) Bardzo ciekawy zwierzak, szkoda tylko, ze taki agresywny. Mam nadzieje, ze nie wyprze z naszych akwenow lokalnych konkurentow.

Korzystajac z okazji - wszystkiego najlepszego w Nowym Roku!!!

  • Great 
  • Maite Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 998 W: 65 N: 1270] (5199)
  • [2008-01-01 2:53]

Dear Michal
Seeing at this amazing and fantastic capture of yours I want to take the opportunity to thank you for all the great moments enjoying your marvellous pictures and your pleasant comments. I hope to keep enjoying with a lot more from you during the coming year.
Have a great Night and may 2008 will bring you great moments and lots of Happiness!!
With my best wishes


Hi Michal,
Excellent detail, color, DOF, and I like the way you've lit-up this "Killer" shrimp..
Very good notes on this invasive species, descibing the damage it's doing.
Great post,

  • Great 
  • GLEM Gold Star Critiquer/Gold Star Workshop Editor [C: 540 W: 87 N: 750] (10)
  • [2008-01-03 4:42]

HI Michal,
très belle image d'un animal peu commun et pas facile à photographier. Parfaite composition sobre, lumière et couleurs agréables.

Je vais en pologne cet été (Legnica) pour le mariage d'un ami, sais tu quel est le meilleur moyen de s'y rendre depuis Paris.


Excelent posting Michal,
have you same books with this group, (determinator or a key for identification?) I am interested about this gruop, with Decapods also.

thanks for sharing,

No witam, witam!
Rzeczywiscie, trzeba to przyznac bez 2 zdan, ze zdjecie wyszlo bardzo ladne! Ostre, wyrazne kolory, dobry detal i glebia ostrosci. Tylko troche tlo takie malo naturalne (szalkowe ;> hehe!)
Pozdrawiam serdecznie,

  • Great 
  • horia Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2158 W: 224 N: 4749] (16656)
  • [2008-01-04 7:29]

Hi Michal

Nice to hear from you again and thank you for your very nice wishes for 2008.
I also want to wish you only the best in this New Year, many successes from all points of view and, perhaps above all, health (because without that we can't really do anything).

This is indeed a great shot, one both aesthetic and splendid for any biology presentation.
The details are simply impeccable and the colors are gorgeous.
The lighting is also superbly managed and it brings out the best in the shrimp.
I see you've been undergoing some very interesting researches about this species (and not only). I would dare to say it's a global thing and invasion can be found at all kinds of animals (we have the same thing in Romania, too, with several fish species from what i've heard from a colleague of mine, but also some exotic turtles that are gaining territory by the day).
I don't want to be pushy about this at all, but just as i invited Radek, i would also like to welcome you to publish at our North-Western Journal of Zoology which is now covered by ISI any studies you would like about zoology from any part of the world.

That being said, i would once again like to wish you an excellent New Year and all the best, my friend!
Bravo and TFS

Hi Michal,
I almost overlooked this picture but now I want to make good on the slip:
This is one of the pictures that really motivate me to work in TN: it is of excellent quality (the light from the side and from underneath, clever!) . And what an interesting animal you present, new to TN ! Last but not least your note is a trove of interesting info, all new to me. Thanks for your effort. My best wishes go with you for your research (I will also keep an eye now on our Aare river!)
Best regards

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