Divers Divers is a subtheme of the Town theme that was centered around maritime exploration and was introduced in 1997 . All its twelve sets were released in that single year . They were still for sale and featured in catalogs in 1998 but the theme was ultimately phased out in the following year . The theme ' s sets featured mini submarines , divers and underwater bases as well as surface ships and various forms of sea life . Unlike the futuristic Aquazone theme the Divers sets were more realistic and set in the present . Due to its largely unprecedented setting , many new LEGO elements were introduced with this series . Description . The eponymous " divers " of this theme were involved in underwater treasure hunting and the exploration of the sea life , mostly sharks . The design of their equipment is based upon present day technology . The relatively high level of realism shows also in the use of real world on the ships . Some of the sets also included a detailed underwater landscape built onto a Baseplate which served as varied backdrops for the dives . 6559 Deep Sea Bounty even included a whale skeleton on the seafloor . The sets had a great selection of sea creatures in them . Many of these sea creatures are unique or very rare . The 2007 theme ; " Aqua Raiders " can be considered a partial revival of divers . While Aqua Raiders focuses more on treasure hunting than exploration , it still retains a certain level of realism instead of being too futuristic like Aquazone . Vehicles and equipment . Since this theme focused mainly on maritime exploration , the main features of this theme ' s sets were seagoing vessels , such as submarines and ships . The divers of this series were in possession of five major ships , which are all relatively unique designs . The biggest ship is included in 6560 Diving Expedition Explorer . It is primarily a transporter for a submersible and is equipped with a large crane for hoisting it . It superstructures comprise a repair hangar for the sub and the bridge above it . A very unique boat is included in 6559 Deep Sea Bounty . It has a catamaran hull and is equipped with a crane for a shark cage . The other three ships , included in 6441 Deep Reef Refuge , 6557 Treasure Hunters and 6558 Shark Cage Cove , had a largely similar overall appearance . They consisted of a six studs wide hull with a small deck house at the front and flat storage space at the rear . They were all equipped with rope winches that in some cases ended in cranes . The sets included a total of seven submersibles , which all had a dome - shaped window on the front . Only two of those subs , included in 6599 Shark Attack and 6557 Treasure Hunters shared the same design , all others were unique designs . Most submersibles had only enough room for the pilot , as the two mentioned before , and the ones from 6559 Deep Sea Bounty and 6560 Diving Expedition Explorer . The last one was also the only smaller sub with robot arms . Only two subs were large enough to contain an additional crew compartment in the back and had also robot arms at the front . These two were included in 6442 Sting Ray Explorer and 6441 Deep Reef Refuge . The submarine contained in 1782 Discovery Station , was the most unusual . It was the only one that was white and was equipped with four robot arms . The divers also had two bases . An underwater research station , included in 6441 Deep Reef Refuge , and a larger offshore platform . New Pieces . Although the theme made good use of many underwater specific pieces that were initially released with Aquazone , it introduced many new pieces such as the one - piece inflatable boat , and a diving mask , the scuba tank and the harpoon gun , which all reappeared in Aqua Raiders ten years later . This theme also made some additions to LEGO ' s sea life with animals like the manta ray , which did not reappear after 1999 , and grey sawfish heads which were reused in the imperial flagship in the 2009 pirates . A black version was available in the set 4789 Alpha Team Aquatic Mech from Alpha Team . Other exclusive parts are the red and blue diver down flags . Sets . All sets were introduced in 1997 and were available until 1998 .