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Thread: Killer shrimp!

  1. #1

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    Default Killer shrimp!


    0 Not allowed!
    So I got a few whisker shrimp yesterday and was a bit worried after I got them that they would kill my neon tetras while they slept, upon coming home from work today expecting to see some dead tetras they where all fine. But then I saw a little piece of clear skin floating around and only 3 out of 4 shrimp. Those little bastards are cannibals! I wish I had seen the fight :( too bad they are nocturnal.

  2. #2

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    1 Not allowed!
    Seeing a piece of clear skin (from the shrimp I take it), doesn't necessarily mean a shrimp has been killed. Shrimp do shed their exo-skeleton and that is clear. Once they shed their new shell needs to harden so they usually hide for awhile.
    I'm not sure what whisker shrimp are or what colour they maybe but dont count the shrimp as dead just yet. When a shrimp has died you will usually see some meat with the skin.
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  3. #3

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    1 Not allowed!
    I thought the same thing the first time my crayfish shed....it does look like "they" died...lol

  4. #4

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    2 Not allowed!
    A freshly killed shrimp will quickly turn a pinkish white. A shedded skin is translucent white. After moulting shrimps tend to hide for several hours until they've hardened.

    I think it's not a good idea to place 4 unknown shrimp in a single tank expecting them to attack and kill eachother and the fish.

  5. #5

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    1 Not allowed!
    Quote Originally Posted by Carmine View Post
    So I got a few whisker shrimp yesterday and was a bit worried after I got them that they would kill my neon tetras while they slept, upon coming home from work today expecting to see some dead tetras they where all fine. But then I saw a little piece of clear skin floating around and only 3 out of 4 shrimp. Those little bastards are cannibals! I wish I had seen the fight :( too bad they are nocturnal.
    I agree with Hardy - why would you purchase these shrimp in the first place if you thought they might attack your neons?

  6. #6

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    0 Not allowed!
    I haven't ever heard the name whisker shrimp before, but I looked it up and it can refer to various species of macrobrachium. If your shrimp have long, pronounced pincers that would also support this.
    The various macrobrachium are known to be aggressive, predatory and cannibalistic, and certain species like M. carcinus or M. Rosenbergii can exceed a foot in body length.

  7. #7

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    0 Not allowed!
    May I ask where you got that body length from? Sources I know (including a few scientific papers) say no more than 6 inches and that seems to be confirmed by keepers.

    If these are indeed macrobrachium you got a big issue. In many species it's only the males that have the big arms which makes the females less efficient hunters. Despite that they will all have a certain agressive and predatory temperament. They're interesting shrimp to keep and can do well in something as small as a 5-8 gallon (depending on the shape of the tank of course) but they don't mix well with company.

  8. #8

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    0 Not allowed!
    Update: turns out you guys were right! It did just shed its exo-skeleton. And for you whiners no I didnt know they were potential killers until after I bought them. They all seem to be female becasue their claws are extremely small. They would have to coordinate with each other to be able to kill my smallest tetra. But im pretty sure they are too stupid to do that. Biggest issue in my tank now is my white skirt tetras fighting, the big one keeps on nipping at the smallers ones fins and tearin them up. Not sure if I should just flush the s.o.b. or let nature take its course. I guess we'll see how it goes.

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    0 Not allowed!
    Quote Originally Posted by Carmine View Post
    Update: turns out you guys were right! It did just shed its exo-skeleton. And for you whiners no I didnt know they were potential killers until after I bought them. They all seem to be female becasue their claws are extremely small. They would have to coordinate with each other to be able to kill my smallest tetra. But im pretty sure they are too stupid to do that. Biggest issue in my tank now is my white skirt tetras fighting, the big one keeps on nipping at the smallers ones fins and tearin them up. Not sure if I should just flush the s.o.b. or let nature take its course. I guess we'll see how it goes.
    You don't ever flush anything, s.o.b. or not.
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    1 Not allowed!
    Quote Originally Posted by Carmine View Post
    Update: turns out you guys were right! It did just shed its exo-skeleton. And for you whiners no I didnt know they were potential killers until after I bought them. They all seem to be female becasue their claws are extremely small. They would have to coordinate with each other to be able to kill my smallest tetra. But im pretty sure they are too stupid to do that. Biggest issue in my tank now is my white skirt tetras fighting, the big one keeps on nipping at the smallers ones fins and tearin them up. Not sure if I should just flush the s.o.b. or let nature take its course. I guess we'll see how it goes.
    Please do not flush the fish! There is always an alternative. Can you use a divider? Can you take them to a petshop? Can you give him to someone else, a member on here or elsewhere? There is always a way out of trouble.

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