The Aquaraiders subtheme started and ended in 1997 and was the descendent of the Aquanauts and Aquasharks subthemes when these were discontinued. The Aquaraiders where an alternate villain faction that competed with both the Aquanauts and Aquasharks and consisted of three vessels in black with green accents and trans-neon green window pieces. The ships had accessories that looked like drills and grinders and had an exotic look for submarines.
Aquazone was an underwater theme introduced by LEGO in 1995 that lasted until 1999 and contained five subthemes all of which took place in the ocean and typically involved two sides fighting each other for valuables such as Hydrolator Crystals.