'If you can find my submarine, it's yours,' Russian oil billionaire Roman Abramovich once said. And it seems the oligarch and Chelsea FC owner, whose submarine is just one of the extras that came with his £300million superyacht Eclipse (perfect for getting to shore undetected), is not the only wealthy businessman splashing out on underwater exploration. Dubbed Earth's real 'final frontier', the oceans are still so little-explored that billionaires are queuing up to buy vessels that give them a glimpse of the dramatic seascapes and incredible wildlife of the world's oceans. So if you have a spare few million in the bank and want some holiday snaps and Instagram posts that will really trump everyone else, you may want to snap up one of these... Whale of a time: The OrcaSub takes you 2000 feet beneath the surface in two pressurised Perspex viewing domes for optimum exploration . The OrcaSub by Spymaster . Sleek, silent and somewhat expensive, this submarine is the perfect toy for the underwater wildlife-lover. The streamlined vessel was built with the intention of allowing explorers to come eye to eye with the creatures of the deep without scaring them off. In light of this, the luxury vehicle is battery power to allow passengers to sail silently through the water. Adventurers can explore up to 2,000ft below the surface at a speed of 6 knots per hour. Pilots will be encased in pressurised spaces with Perspex domes, which give a 360 degree underwater view of everything from shipwrecks to coral reefs. The OrcaSub does not come cheap and will set you back £1,284,169 ($1.9 million). Whale watch! What makes the Migaloo stand out from the crowd is the ability to experience nature both above and below the water, as the vessel can be both a yacht or a submarine . At one with nature: The vehicle by Motion Code: Blue allows a diving depth of 820 feet, providing your guests with a luxury adventure . Luxury surroundings! Sail through the seas in a two-storey owner's suite and eight VIP suites for guests . Migaloo by Motion Code: Blue . The super rich do not have to decide whether to use their yacht or their submarine, as the two double up as one with the Migaloo by Motion Code: Blue. The 377 feet long private white yacht allows for complete privacy as you can chose whether to lounge on the sun roof above waters, or whale watch below the surface with a maximum diving depth of 820 feet (250 metres). It also boasts a helipad, a two-storey owner's suite with a private patio and eight VIP suites for guests. Motion Code: Blue are yet to build one of these to order, but it is estimated to cost about $2.3 billion to construct one, if you compare it to a similar Virginia-class attack submarine by the U.S. Navy, which dives at the same sort of depths. Sir Richard Branson enjoying a ride in the Super Falcon from DeepFlight which automatically floats to the surface for safety . The technology allows submarines to be piloted by the owner (or a designated crew member) after a short training session and do not require a highly specialised pilot. Pictured here is The Dragon . Super Falcon and Dragon by DeepFlight . If these submarines are good enough for Sir Richard Branson, they are surely good enough for us. These personal submarines aim to be both innovative and safe, as being buoyant, they automatically float to the surface of the water. They currently offer two DeepFlight submarines: Super Falcon and Dragon. They are both capable of barrel rolls with dolphins, or spy-hopping out of the water like a whale. Additionally, DeepFlight are all-electric and have zero emissions. The Super Falcon and Dragon are priced at £1.15 million ($1.7 million) and £1 million ($1.5 million) respectively. The Super Yacht Sub 3 offers compact private submersible sailing, and allows three passengers to explore the ocean . U-Boat Worx has developed the submarine, which is perfect for exploring underwater life up to 984 feet below the surface . Super Yacht Sub 3 by U-Boat Worx . It has a somewhat ominous name, but the U-Boat Worx design is a somewhat intimate way to explore the ocean beneath your superyacht. The Super Yacht Sub 3 is known as the sports car of the seas and lets a pilot and two passengers plunge 984 feet (300 metres) below the surface. Not only a luxurious trip, but the panoramic front window allows for incredible views of the fish, and aquatic life. Costing slightly more than the average car, the all-included price is £900,000 - a snip for a billionaire. A unforgettable night! Oliver's Travels lets you rent out a submarine, complete with Captain, chef and butler for £175,000 a night . Ocean dining! To complete the luxury experience, a specialist aphrodisiac tasting menu has been developed to ensure that guests are in the mood to make full use of the Lovers Deep facilities, free of charge for those with a honeymoon package booking . Mile Low Club by Oliver's Travels . For those wanting to plan a date with a difference look no further than a trip aboard Lovers' Deep, a luxury submarine specialising in romantic getaways. It's the perfect underwater escape for those who can't stretch to buying their own submarine, but can still pay big bucks for an ultra-luxurious experience. Guests will be looked after by a crew consisted of a captain, chef and personal butler, who reside at the other end of the vessel. The world is your oyster as the concierge service allows you to be in complete control of your adventure, so you can moor up anywhere from a stunning coral reef off the coast of St. Lucia to near a sunken battleship in the Red Sea. With optional extras including helicopter transfers with a beach landing, free rose petal scattering service or champagne breakfast in bed, it could make an unusual romantic package. That is if you can afford the price tag, which is a hefty £175,000 per night (excluding air travel). The Trilobis 65 is a 65 foot long eco-yacht for six people, ideal for bays, atolls and sea parks . Best of both worlds! Whether you want to lounge on deck, or see underwater, the vessel caters for all . Trilobis 65 by Giancarlo Zema Design Group . This vessel is the water equivalent of a space ship, and is the first eco-yacht allowing guests to experience underwater life in a non-polluting habitat. Trilobis 65 consists of four levels that are connected by a spiral staircase, including an ocean viewpoint submerged at 9 feet below the surface. It houses six seating places, connect with high-tech software to control lighting, and get real time information on the sea-bed and fish surrounding it. The windows are electrochemical and change their opacity manually or automatically, depending on how light it is outside. The solar energy on top help to power the vehicle, and the electric engines are driven by hydrogen fuel cells that produce drinking water as waste material, through an electrochemical process, making the vessel a non-polluting project. It is priced at approximately £3.6 million (€5 million) with customisation available for furnishings and décor. Aqua adventure: The C-Explorer 3's bowl-like interior makes you feel as though you are in an aquarium as you navigate passed fish and aquatic life . C-Explorer 3 by U-Boat Worx . Another offering by the U-Boat Worx team is the C-Explorer 3. This boasts 360 degree panoramic viewing thanks to its acrylic hull, enabling you to feel as close to nature as possible. The round orb gives the feeling of being in an aquarium, creating the ultimate ocean experience. Enjoy your submersion in luxury, with a comfortable interior and viewing area. The extra view comes at an added cost, with prices for this vessel starting from £1,450,000 (€2,000,000).
Feel like a James Bond villain with the most advanced submerged ocean vehicles . Some convert from a yacht into a submarine, and others detached off for a speedy exploration . Oliver's Travels offers a Mile Low package on its submarine, complete with chef and butler for £175,000 a night .