One of the new species captured on camera during the dive to the Mariana Trench.
Vescovo's journey was filmed for Discovery Channel and has been dubbed the "Five Deeps Expedition".
Vescovo's sub, DSV Limiting Factor, utilizes new technology capable of multiple dives due to its a 90-millimeter-thick titanium pressure hull built to withstand the pressure of the deep.
Businessman Victor Vescovo broke the record for deepest dive ever by reaching the bottom of the Marianna Trench.
After spending hours crisscrossing the bottom of the Challenger Deep, collecting video evidence of different wildlife, geological formations and man-made objects, Vescovo stopped for a second.
Previous to Vescovo, oceanographer Don Walsh was the first to make it down to the trench descending about 35,814 feet (10,916 m) in the 1960s, and Canadian filmmaker James Cameron also descended to a depth of 35,787 feet (10,908 m).
Among the observations from the dive: A plastic bag and sweet wrappers seen at Earth's deepest spot, four new species (pending scientific analysis), red and yellow rocky outcroppings, and the deepest living fish-the Mariana snailfish seen at 26,247 feet. As well as the Mariana Trench, it's now completed surveys of the Atlantic Ocean's Puerto Rico Trench, the South Atlantic's South Sandwich Trench and the Java Trench in the Indian Ocean. The Mariana Trench is deeper than Mount Everest is tall.
"It is nearly indescribable how excited all of us are about achieving what we just did", Mr Vescovo said after arriving in Guam after the completion of the dives.
The expedition has explored the deepest points of four of the five oceans so far, leaving only the Arctic Ocean's Molloy Deep, exploration of which is scheduled for August 2019. According to the CNN, the expedition team stated that they plan to test these samples to check how much plastic gets ingested.
What's more shocking in the report is the epidemic proportions of plastic in the world's oceans, with an estimated 100 million tonnes dumped there to date.
A technician checks the DSV Limiting Factor aboard the research vessel DSSV Pressure Drop above the Mariana Trench in an undated photo released by the Discovery Channel.
For the fourth time, the Five Deeps Expedition has successfully dived to the bottom of one of the world's five oceans.