Brickipedia
“This is the only Aquaraiders set with more than one vehicle. It is made up of two vehicles, which attach together. The bottom vehicle is a rover, with three wheels. It has a drill in front. It has a large storage space for crystals. It also carries two diving flippers. The... More other vehicle is smaller, but propels itself with propellers.”
Full review at brickipedia.fandom.com
Lego Maniacs' Guide
“The Hydro Reef Wrecker (neat name) is a rather bulky model comprised of a three-wheel surface roving unit (much like the 1728-Crystal Crawler) with a detachable minisub that fits nicely on the back. Two crystal boxes and a spacious 6x9x3 area for storage are located just... More beneath the minisub's docking base. Three giant drills on the face of the rover unit give it a very nasty appearance.”