ἐνθαλάσσιος
From LSJ
εἰς πέλαγος σπέρµα βαλεῖν καὶ γράµµατα γράψαι ἀµφότερος µόχθος τε κενὸς καὶ πρᾶξις ἄκαρπος → throwing seeds and writing letters at sea are both a vain and fruitless endeavor
English (LSJ)
ον, = sq.,
A νεῶν ποιμαντῆρσιν ἐνθαλασσίοις S.Fr.432.10.
German (Pape)
[Seite 841] att. -ττιος, auf dem Meere, Soph. frg. 379; VLL.