Domitian became emperor in 81 AD with the death of his brother Titus (it is rumored that he also help the process along.) He left his dying brother so that the Praetorian Guard could name him emperor. When news of Titus’s death reached the senate they chose to honor the dead emperor before honoring the new one. This instantly created tension between Domitian and the senate that continues throughout his reign. Once the senate honored Domitian as emperor one of the titles he gained was that of Augustus. This is one of the earliest coins from when he became emperor and on the obverse lists his multitude of new titles and honors. This interesting detail of this coin is on the reverse though, the dolphin intertwined with an anchor. This is a symbol of Augustus, the first emperor, and he may ne trying to impose a relation between the two of them. It is also thought that the reverse could be honoring Neptune as Titus had created a series that honored the various gods after the eruption of Mt. Vesuvius that destroyed Pompeii, Herculaneum, Oplonti, and Stabiae.