Anal fins along the belly.
Share of the depth above the spine: 0.5 symmetric, 0.65 humped back, 0.35 deep belly.
Share of the total length that is body; the rest is the tail fin.
Deepest body height (back to belly). 0.15 = slender (pike), 0.6 = disc (tang).
Where the body is deepest, as a fraction of the body (not counting the tail fin).
Dorsal fins along the back, front to back.
Eye.
Height on the head: −1 belly … 1 back.
Distance from the nose as a fraction of the total length.
Radius as a fraction of the total length.
Mouth.
Length of the mouth line as a fraction of the total length.
−1 underslung (carp, shark) … 0 terminal … 1 upturned.
Nose shape exponent: 0.4 blunt and round … 1.2 long and pointed.
Pectoral fins (behind the gills).
Tail-stalk (peduncle) height as a fraction of the deepest height.
Pelvic fins (under the belly).
Cross-section exponent: 2 = ellipse, 3 = boxy.
Tail fin.
0 = symmetric, 0.5 = upper lobe much longer (sharks).
0…1 depth of the notch for forked and lunate tails.
Span (tip to tip) as a fraction of the total length.
Outline.
Widest body width.
Body shape. Lengths are fractions of the total length (the fish is built 1 unit long and scaled).