§188.1Fr. 188
Δίοτι τὴν χροιὰν ὁ πολύπους ἐξαλλάττει;
Why does the octopus change its color?
πότερον, ὡν Θ. ᾤετο, δειλόν ἐστι φύσει ζῶον;
Is it because, as Theophrastus thought, it is by nature a cowardly animal?
ὅταν οὖν ταραχθῇ τρεπόμενον τῷ πνεύματι συμμεταβάλλει τὸ χρῶμα εἷ καθάπερ ἄνθρωπος.
Therefore, when it is disturbed, being changed in its breath (pneuma), it changes its color along with it, just like a human.