The final Aquazone subtheme in 1998 was the Stingrays, which were fish-like mutants and enemies of the Hydronauts who used underwater vessels that resembled sea creatures. The villains included Commander Manta Ray and Raven Ray and the subtheme contained 5 sets and set 6109 Sea Creeper was the same as set 6140.
1998 LEGO Sets
1998 marked LEGO’s leap into programmable play with the launch of LEGO Mindstorms, combining motors, sensors, and code for user-built robots. LEGO also entered digital entertainment with games like LEGO Creator, LEGO Loco, and LEGO Chess. New themes included Adventurers, following Johnny Thunder’s global expeditions, and Insectoids, a sci-fi successor to Exploriens. LEGO Castle revisited classic factions such as Crusaders and Dragon Masters, reconnecting with its medieval roots while bridging into modern set design.