Additional Info
Source: PVP Season 8 Reward
Rotworm Trophy: Season 8 (Interior) SWTOR decoration, screenshots and information!
Hook: Floor Medium Narrow (Blue Rectangle): The Rotworm Trophy: Season 8 (Interior) decoration fits into a narrow blue medium rectangle floor hook.
Hook: Floor Medium (Blue Square): The Rotworm Trophy: Season 8 (Interior) decoration fits into a blue medium square floor hook.
The Rotworm Trophy: Season 8 (Interior) decoration is retired.
These specific trophies used to be available from the Ranked PvP vendor, but are no longer availabled and are considered retired. Many similar trophies and reward moved over to becoming PvP Seasons Tokens rewards, but not all did.
Source: PVP Season 8 Reward