In the 19 years of keeping piranha I have never heard of a 3ft piranha, and knowing some of the guys that have been into piranha for close to 40 yrs they have never heard of a 3ft piranha. There has been struggle points in even getting a verified 18in black rhom. Many claims over the years but in almost all cases when a tape measure was applied the rhom was 17-17.5in.
Would love to see this evidence of a 3ft piranha. Largest piranha I have seen was either a 21 or 22in piraya.