Anyone have any idea? I got a 4”.. was just wondering how long till this guy hit 8”..
Rhom (serrasalmus Rhombeus) growth rate?
- Thread starter Marximus
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I had a Black Rhombeus Piranha many yrs ago and gave it to a friend because it was growing so slow unlike Redbelly that grow fast and steady imo.
It will be worth the wait because they are beautiful when mature.
Typically 1” per year for rhomb. Not sure if that is true for such a small size but I know they are very slow growers.
Rhom average about .5in a year. They get to about 5in quickly and the slow down drastically. At some point they stop around 10-11in. If you’re lucky it will grow to 12in. I had my rhom for 18 years. I thought he was close to 12in but when he died and I measure him, he was only 10.5in.
Just wondering if u know the average rate. IIke will it gr
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thank you for the input! Can u tell me what u fed him?
Variety of stuff over the years. When I didn’t know better it was goldfish but then transitioned to smelt, shrimp, filet of various fish. I got him onto pellets for a bit too.
a hi protien diet and higher water temp and your black will will grow 2 inches a year til he hits 6 inch range then he will slow down to 1 inch a year, they will max out at around 18 inch and push 20 years or better
In keeping piranha for 20 years and knowing people keeping them for 50 years, I do not know of more than a handful cases of people growing rhoms to more than 12in in captivity. Those that did bought their rhoms between 9-10in and those stopped at 13. While they definitely grow to 17-18in the wild, it will not happen in captivity. The longest lived rhom I am aware of was 36 years which was a member on this forum with several others that pushed past 30.
i can speak about my personal keeping of my fish, i myself grew two blacks both started from just over 5 inches to one at 12 inches and the other a hair under 14 inches in a split 365g before i rehomed them and had them in that tank for just over 10 years so they do and will grow to larger then 10-11 inches without a dout in captivity as i have seen it and done it, there are people on here that also have them larger then 10-11 and there were a many of us on pfury that had blacks well over 11 but did they raise them all from 1 inches babies,who knows but the point is they will and do get larger then 10-11 inches in captivity. there are tons of youtube videos of blacks well over 10-11 inch thats people have had for years, to me 10 inch would be considered nowhere near full grown. i been doing piranha for almost 40 years. to say they stop growing at 10-11 inches is simply not true.just because yours was 10 inches at 18 years old does not mean they are all that way,i would say your black at 10 inches was exceptionally small for 18 year old fish and his growth was probably stunted from something, now that could have been from feeding quality to water quality or just bad genetics of that said fish but 10 inches at 18 years old is not the norm for blacks.
as for age who knows what they will really live for, 36 years is def believable,no one really knows exacxtly how long a blacks life cycle really is,as for total size i have heard tales they can hit over 24 inches in the wild and that fisherman have caught them close to that but they just dont make it alive during exporting so most importers dont even try importing any blacks over 10 inches because the death rate is extremely high for monster blacks hence the reason larger imported blacks are so pricey,so anything your seeing over 10 inches most likely was grown here.
as for age who knows what they will really live for, 36 years is def believable,no one really knows exacxtly how long a blacks life cycle really is,as for total size i have heard tales they can hit over 24 inches in the wild and that fisherman have caught them close to that but they just dont make it alive during exporting so most importers dont even try importing any blacks over 10 inches because the death rate is extremely high for monster blacks hence the reason larger imported blacks are so pricey,so anything your seeing over 10 inches most likely was grown here.