κάλλιχθυς
From LSJ
ἑτέρως ἠδύνατο βέλτιον ἢ ὡς νῦν ἔχει κατεσκευάσθαι → otherwise they could have been constructed better than they are now (Galen, On the use of parts of the body 4.143.1 Kühn)
English (LSJ)
υος, ὁ,
A beauty-fish, = ἀνθίας, Arist.Fr.316, cf. Hedyl. ap.Ath.8.344f, Numen. ap. eund.7.295b; but distd. from it by Dorion ib.282e, cf. Opp.H.3.335.