11-07-2006, 11:39 PM
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There is a trick to catching them. For starters, if possible, drain the tank down about 1/2 way, even if you save the water to be put back in later. That gives them 1/2 the space to get away. Beyond that, it's a 2 handed job. One hand "herds" them into a corner, and the other has the net. I used to hate catching the last one in a 30 gallon sales tank, but you learn to gauge their reactions if you do it often enough.
Some fish instinctually head for corners of a tank, others hit plants, while others hit rock work... and still others will race around like crazy going anywhere/everywhere... and some will even dive down into the gravel and attempt to bury themselves. If you think danios are difficult to catch, try baby red belly piranah about the size of a dime. They bite at that size if you corner them, and it hurts plenty. Those little guys are worse than danios anyday.