Just cleaned this bronze coin of Theodosius whose mint mark is ANTB. The Emperor on reverse is standing on galley, wearing military dress. He's raising his right hand and holding a globe with the other. Wreath in left field, and Cross in upper right. Victory in the rear . So common, maybe. But I noticed that the prow of the galley has the head of an animal with 2 horns! Is this usual on Roman prows ?
Roman Republican bronzes minted about 500 years before this also show decorated prow stems from time to time. So the answer is likely "yes".
Here's mine. Also appears to be an animal head prow. Mint mark is not really clear but it appears to be Cyzicus: Theodosius I, A.D. 379-395 AE 23, 4.8 grams, 12H Obverse: DN THEODOSIVS PF AVG, Pearl diademed, helmeted, draped and cuirassed but right, holding spear and shield Reverse: GLORIA ROMANORVM, Theodosius standing left on galley, head right, raising hand, Victory at helm, wreath in left field Mintmark: SMKB Reference: RIC IX 14c.2, p. 242 From the collection of Doug Smith courtesy of JAZ Numismatics