Here's the current texture of the fish

  texture {
   pigment {
    image_map{
     png "rainbow_p1"
     interpolate 2
    }
   }
   normal {
    bump_map {
     jpeg "trout_p1_bump"
     bump_size  0.1
     interpolate 2
    }
   }
   finish {
    specular 1 roughness 0.02
    ambient rgb 0
    reflection{0.3}
   }
  }

Gail
--
#macro G(H,S)disc{0z.4pigment{onion color_map{[0rgb<sin(H/pi)cos(S/pi)*(H<6)
cos(S/pi)*(H>6)>*18][.4rgb 0]}}translate<H-5S-3,9>}#end G(3,5)G(2,5.5)G(1,5)
G(.6,4)G(.5,3)G(.6,2)G(1,1)G(2,.5)G(3,.7)G(3.2,1.6)G(3.1,2.5)G(2.2,2.5)G(9,5
)G(8,5.5)G(7,5)G(7,4)G(7.7,3.3)G(8.3,2.7)G(9,2)G(9,1)G(8,.5)G(7,1)//GS

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