Hi Mike,
The analogy of the lanky freshman basketball player really is where my view is. I really don't know enough about what Jaco is breeding from, his climate, his growing conditions, or his vision to comment on or compare his tosai to others, except to say that a couple appear thick for the size and age,... but again, I have no details on the growing conditions. What I like to see in tosai ideally is a long slim body, large pecks, and a large mouth/head. My opinion is actually opposite 180 of what you described - I feel that thick compact looking tosai will grow into pigeon chested short thick adult Koi. I prefer to see a young Koi with exaggerated pecks and bone structure features that will grow into a sleek stout strong long adult Koi. Koi are so pliable,... so much can be changed or manipulated by the keeper,... sometimes purposefully, and sometimes unintentionally, but that is a subject that we can chat on for days and days. The "loose" body shape, and poor coloration of Koi grown in tropical climates is just one quick example.
Though some may find this offensive, the analagy I like to use to express my thoughts on Koi body shape is this: We men all like to see a woman with a 38 D breastline, 24" waist, and 36" hipline, a great proportion/ratio showing beautiful curves,... BUT, remember the girl that had those measurements,... but in the 7th grade??? Have you seen her lately??? Now, remember the girl in the 7th grade that was built like a pencil??? Have you seen her lately??? My feeling is a Koi's body should blossom late, and look wonderful for many years.
Best Wishes,
Brady Brandwood
