What's That Bug? does not endorse extermination

Type of bug needs I.D.
January 9, 2010
Just found this bug with an aquarium order I received this week. Found it in a tank with some guppies. I really have no idea what it is or how it came to be. I would appreciate it if you could identify it.

Water Scorpion

Water Scorpion

Hi Scott,
This is a Water Scorpion in the genus Ranatra and there is information on BugGuide.  Water Scorpions are predatory True Bugs and they will eat the guppies, so you should not keep it in the tank.  Prey is captured in the raptorial front legs and the sucking mouthparts will drain the prey of its fluids.  The Water Scorpion may have been introduced on plants.  Water Scorpions, like many other aquatic insects, can make interesting pets, but as they can fly, you should keep the tank covered.  Interestingly, we have a section in the book manuscript we are writing entitled “What’s That in the Aquarium” that is devoted to aquatic insects sometimes encountered by the aquarist.

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What's That Bug? does not endorse extermination

2 Responses to Water Scorpion found in Guppy Tank!!!

  1. Donna Webber says:

    Hi there, I am finding lots of these bugs in my salt water swimming pool. How can I get rid of them? Do they bite?
    Regards Donna

    • bugman says:

      Water Scorpions are so named because of the painful bite received by waders and swimmers in lakes and ponds who accidentally encounter them. We do not provide extermination advice.

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