Quaestiones Naturales

Is it because all fishes of the soft kind cannot endure cold, by reason of their nakedness and tenderness? For they are covered neither with shell, skin, or scale, though within they have hard and bony parts. Hence the Greeks call them soft fish. Therefore they easily perceive a storm

coming, since they are so soon affected by the cold. When the polypus gets to shore and embraces the rocks, it is a sign the wind is rising; but the cuttle-fish jumps up, to shun the cold and the trouble of the bottom of the sea; for, of all soft fishes, she is the tenderest and soonest hurt.