CRAWFISH, CRAYFISH, OR CRAWDAD. NO MATTER HOW YOU SAY IT, IT BOILS DOWN TO ONE BIG QUESTION:
GREAT SCAVENGER?  or  AQUARIUM MENACE? LETS FIND OUT!
CLICK HERE TO FIND OUT!
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CRAWS ARE GREAT SCAVENGERS, AND WILL EAT JUST ABOUT ANYTHING.  OF COURSE THIS ALSO INCLUDES FISH!
CRAWS ARE ALSO CONSUMATE ESCAPE ARTISTS AND CAN AND WILL BAIL OUT YOUR TANK IF POSSIBLE.
CRAWS ARE CONSTANTLY LYING IN WAIT FOR YOUR FISH. NOT TRUE! CRAWS ARE OPPORTUNISTIC FEEDERS WHO WILL SWIPE AT FISH, BUT GENERALLY THEY SPEND THIER TIME EITHER NIBBLING ANYTHING THEY CAN FIND OR TRYING TO ESCAPE.  THIS IS NOT TO SAY THEY WOULDNT EAT A FISH IF THEY CAUGHT IT, CAUSE THEY WOULD. IM JUST SAYING THAT IN MY EXPERIANCE THEY DONT EXPEND TOO MUCH EFFORT TRYING. 
GOT ANY CRAYFISH PICS?  SEND THEM HERE.
BOTH OF THESE GUYS ARE OPPORTUNISTIC OMNIVORES, IF YOU CAN KEEP THE CAT, YOU CAN KEEP THE CRAW!
IF THIS GUY WOULD BE ALRIGHT, THEN SO SHOULD THIS GUY!
CRAWS ARE  OMNIVOROUS, AND WILL EAT WHAT THEY FIND/CATCH.  SO WHATS THIS MEAN? DONT KEEP THEM WITH FISH SMALLER THAN THEM. LOOK AT YOUR TANK, WOULD YOU PUT A MED. SIZE CATFISH IN THERE? IF THE ANSWER IS YES, A CRAW WOULD BE OK. IF THE ANSWER IS NO, THEN LEAVE THEM OUT.  CRAWS ARE FASCINATING CRITTERS WHOSE ANTICS ARE OFTEN AMUSING AND ENTERTAINING. WHY NOT GIVE EM' A TRY.