How big do hoplias malabaricus get?

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someone from japan has 20" mala. let me try to get the pic, but i do not know if he raised one from baby.
 
around 50 centametres so around 20 inches.
 
20 inches is very rare and probly very hard to grow to that size. 16 inches is a good estimate for them in a tank.
 
Mine is gettin' real close to that 16" from a 4-5" lil' guy to a very robust 15+" in 1.5 years. Although he's slowed quite a bit in length, his overall mass has continued to grow in leaps and bounds. I wouldn't be shocked if he hit 20" or more in his lifetime but I have not seen one that large.
 
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