Res Gestae
Ammianus Marcellinus
Ammianus Marcellinus. Ammianus Marcellinus, with an English translation, Vols. I-III. Rolfe, John C., translator. Cambridge, MA; London: Harvard University Press; W. Heinemann, 1935-1940 (printing).
And it is a well-known fact that fish from the remotest bounds of our sea[*](The Mediterranean.) come in schools to this
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retreat for the purpose of spawning, in order that they may rear their young more healthfully in its sweet waters, and that in the refuge of the hollows, such as are very numerous there, they may be secure from voracious sea-beasts; for in the Pontus nothing of that kind has ever been seen,[*](Pliny, N.H. ix. 50) except small and harmless dolphins.