09-01-2011, 10:11 AM
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African Knife Fish are actually very timid, and not really aggressive to other fish similar to their own size. On the other hand, they are extremely aggressive to other knife fish, even outside their own specific species, and any 'weaker' knife fish will most likely die at the hand of the stronger.
They can develop quite interesting personalities though, and if kept in a dimly lit and well planted aquarium, they will come out during the day. Otherwise, they prefer to hide until their aquarium light is turned off for the night.
Also, an African Knife can get up to a foot long, and isn't recommended to be kept with aggressive fish.
Last edited by OddballFishCoveter; 09-01-2011 at 10:17 AM..