ἱππόκαμπος
From LSJ
ἔνδον σκάπτε, ἔνδον ἡ πηγή τοῦ ἀγαθοῦ καί ἀεί ἀναβλύειν δυναμένη, ἐάν ἀεί σκάπτῃς → Dig within. Within is the wellspring of Good; and it is always ready to bubble up, if you just dig. | Look within. Within is the fountain of the good, and it will ever bubble up, if thou wilt ever dig.
English (LSJ)
ὁ,
A monster with horse's body and fish's tail, on which the sea-gods rode, Men.831; ἑστήκει Ποσειδῶν χάλκεος, ἔχων ἱ. ἐν τῇ χειρί Str.8.7.2, cf. Philostr.Im.1.8. 2 a small fish, the sea-horse, Dsc.2.3, Ael.NA14.20, Gal.12.362.