Water scorpions are great favorites of mine. Ive kept several species,, collected some this summer, looking forward to breeding. http://bit.ly/VpkP4Z
I've caught these before when collecting feeders. Pretty cool. Like an underwater preying mantis.
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I saw one of these in the parking lot after work and thought it was a odd variety of cockroach because it appears to have wings. I didn't do anything with it because the big staring eyes told me it wasn't scared. It didn't run so I actually didn't want it to try and bite me in defense if that was going to hurt.
Are they poisonous? (scorpion)
Are they about the same to keep as crayfish? Eat your fish when they want to?
^ Thats one interesting insect... not sure if i've ever come across one myself... but you've definitely peaked my interested...
I've had them. They aren't picky eaters and are pretty easy to care for. If you have a spare tank around they are very cool to watch.