A paired fin (pectoral or pelvic), one on each side.
Droop below horizontal, radians (0 = straight out, ~1.4 = hanging down).
Where on the flank it attaches: −1 belly … 1 back.
Where along the body it attaches (0 = nose, 1 = tail tip).
Fin length as a fraction of the total length. 0 = no fin.
A paired fin (pectoral or pelvic), one on each side.