Paralititan, which translates to "tidal giant," was a colossal titanosaurian sauropod dinosaur genus uncovered in coastal sediments within Egypt's Upper Cretaceous Bahariya Formation. This massive dinosaur lived between 99.6 and 93.5 million years ago. While our knowledge of Paralititan is somewhat limited, particularly in terms of specific dimensions, the available fossil material, notably its lengthy humeri, hints at its status as one of the most massive dinosaurs ever found. It's estimated to have weighed around 59 metric tons (equivalent to 65 short tons).

At the time of discovery, the complete right humerus measured 1.69 meters (about 5.54 feet) in length, setting a record for the longest humerus found in a Cretaceous sauropod. However, this record was surpassed in 2016 with the discovery of Notocolossus, which possessed a 1.76-meter (approximately 5 feet 9 inches) humerus. In 2020, Paralititan's size was estimated to be around 27 meters (88.6 feet) in length and approximately 30 metric tons (about 33 short tons) in weight.

Paralititan's remains originate from Egypt's Bahariya Formation, which has been interpreted as an ecosystem primarily centered around mangroves. The presence of specific fossilized plant types provides evidence for this interpretation. Mangroves are associated with tidal ecosystems, which aligns with the name "Paralititan" and its translation to "Tidal titan." The "titan" part of the name signifies the dinosaur's immense size.

Additionally, it's worth noting that the Bahariya Formation experienced periods of submersion by the sea, corresponding to times of rising global sea levels. Subsequently, it re-emerged as sea levels dropped, marking a dynamic history for this region.