Opalius could refer to:
- ChR Opalius (Hunter-class)
- ChR Opalius (Battlehawk-class)
- ChR Opalius (Swiftwing-class)
- ChR Opalius (22nd century bird-of-prey)
- ChR Opalius (Swarm-class)
- ChR Opalius (Skyhawk-class)
- ChR Opalius (D7-class)
- ChR Opalius (K't'inga-class)
- ChR Opalius (Vas'delatham-class)
- ChR Opalius (Heavy Defender-class)
- ChR Opalius (Vengeance-class)
- ChR Opalius (Gryphon-class)
- ChR Opalius (Vas Hatham-class)
- ChR Opalius (Praetor-class)
- ChR Opalius (Aye Mosaram-class)
- RIS Opalius (Harpy-class)
- IRW Opalius (D'deridex-class)
- RIS Opalius (Raptor-class)
- RIS Opalius (Lanora-class)
- RIS Opalius (Griffin-class)
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