Oceanotitan Facts
| Diet | Herbivore |
| Height | 4m |
| Length | 18m |
| Weight | 15 tonnes |
| Environment | Land |
| Era | Jurassic |
| Period | Late Jurassic |
| Type | Sauropod |
| Location | Portugal |

| Diet | Herbivore |
| Height | 4m |
| Length | 18m |
| Weight | 15 tonnes |
| Environment | Land |
| Era | Jurassic |
| Period | Late Jurassic |
| Type | Sauropod |
| Location | Portugal |
Oceanotitan was a massive sauropod dinosaur that roamed the coastal regions of what is now Portugal during the Late Jurassic period, approximately 152 million years ago. This enormous herbivore lived along the ancient Tethys Ocean shores, which inspired its name meaning 'ocean giant'. Like other sauropods, Oceanotitan possessed the characteristic long neck, small head, and massive body that made these creatures some of the largest land animals ever to exist.
What makes Oceanotitan particularly significant is its classification as possibly one of the earliest members of Somphospondyli, an important group of sauropods that would later give rise to the mighty titanosaurs. This evolutionary position suggests that Oceanotitan represents a crucial link in understanding how sauropods developed and spread across the globe during the Mesozoic Era.
As a herbivore, Oceanotitan would have spent most of its time feeding on the abundant plant life of the Late Jurassic period. Its long neck allowed it to reach high into trees to browse on conifers, ferns, and cycads that other dinosaurs couldn't access. The dinosaur's massive size would have provided protection from most predators, though large theropods of the time may still have posed a threat to younger individuals.
Unfortunately, Oceanotitan is known from relatively limited fossil remains, consisting primarily of tail vertebrae and some limb bones found in Portugal's Lourinhã Formation. Despite this fragmentary evidence, palaeontologists have been able to piece together important details about this ancient giant and its place in sauropod evolution.
Oceanotitan possessed distinctive tail vertebrae and limb bone features that set it apart from other sauropods of its time. Its skeletal characteristics suggest it was an early member of the Somphospondyli group, showing evolutionary traits that would later appear in titanosaurs.
Like other sauropods, Oceanotitan likely lived in herds for protection and may have migrated seasonally in search of food. Its massive size meant it needed to consume enormous quantities of plant material daily, probably feeding almost continuously during daylight hours.
Oceanotitan was first described by Octávio Mateus and colleagues in 2014. The original fossils were discovered at Lourinhã Formation, Portugal.