Attached Link: http://www.toucan.co.jp/indexE.html

they would know better about the seams in the Carrara forum here. my experience at trying to do a carp model (until I found a 3ds model ready-made at the attached link) was that I'd get a seam if the end-point of a cross-section was a corner-point, or a bezier-point with incorrect slope and inflection. splitting the groups of polygons into body-parts is easier in carrara IMVHO (due to orthogonal views), although I haven't tried Poser Pro Pak. however, it may not be necessary to split the body into sections, as it can form a continuous bending s-shape without use of sections. the main problem I found with the fins on the carp I downloaded was that they were one-sided planes, so I had to add just enough thickness to them to get them to display and behave correctly, while still retaining the texture map. The other problem is that the model also has a somewhat sharp edge along the top, so the fix would be to smooth it down in the vertex modeller, or start over with a continuous cross-section. adding bones to the fins may not be necessary if you use the directional wave deformer in Poser to mimic the fin action, provided they are all separate groups. fish fins move very minimally, excepting the pectorals, and are not analogous to arms/legs IMVHO.