fipybirka lujvo

b1 is a fin of fish x2=f1 of species x3=f2.

Cf. fipyrebla, fipfepri, limna'i.


In notes:

fipfepri
fi1 is a gill of fish fe2=fi1 of species x3=fi2.
jacyfepri
fi1 is a gill of animal fe2=fi1 of species x3=fi2
limna'i
n1 is a flipper [body-part] of n2.