Obvious to any fishkeeper, but apparently, these scientists have only just worked out the bigger picture, shoaling is for protection.
Piranha Shoal For Protection.
- Thread starter Lateral Line
- Start date
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pica_nuttalli
don't be a twit
i believe thats what one would call "olds" 
kribensis12
I know where you live
some scientist are what i call " slow"
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