Library Hippolytus Refutation of All Heresies
Book 4
Chapter 38: Illusive Appearance of the Stars
But the scales of fishes — for instance, the seahorse — cause the stars to appear to be; the scales being steeped in a mixture of water and gum, and fastened on the ceiling at intervals.
English translation by J.H. MacMahon, in Ante-Nicene Fathers, Vol. V (eds. Alexander Roberts and James Donaldson; Buffalo: Christian Literature Publishing Co., 1886). Public domain. Digital text via New Advent Church Fathers.