Ἰχθύς ἐκ τῆς κεφαλῆς ὄζειν ἄρχεται → The fish stinks from the head
subs.
V. ψυκτήριον, τό (Eur., Frag.; Aesch., Frag.), or use V. μυχός, ὁ, φυλλάς, ἡ.