"the aquarium, fish always appear larger than what they really are and I can't even begin to tell you how often I have misjudged a fishes true size in the aquarium. Even hobbyists who have emailed me and swore their fish was 16 inches Total Length (TL) would later discover (after measuring out of the aquarium) their fish was actually 3 to 4 inches shorter in size using the scientific method. On average if you think your piranha is 14 inches long (TL), realistically, your fish may only be 10 1/2 long (SL) using the correct method of measurement. I have not seen any report (wild caught) that records red bellied piranhas larger than 12 inches (total length). Larger ones may exist but the record has not been broken using standard length. World records are based more on weight than length of a fish. In the home aquarium is another matter"
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well what i highlighted makes sence. so in this case i need to see pics of this mans giant rbp on the ruler. i know of Frank and his work with p's so i won't dispute his claims of rbp in the 11-12" range. but i would also like to know how common it is for rbp to hit that. will every one get 12"? male jaguar cichlid have been said to hit 16". which they do, but some of the biggest captive males only hit 14-15".