The Ultimate Guide to Spinosaurus spawns

On The Island Spinosaurus can be found in almost any river

On Scorched Earth there are no Spinosaurus

On Ragnarok Spinosaurus can be found in the Canyons

On Aberration there is an Aberrant Spinosaurus that is found in the Fertile Region and the Red Hazard Zone

On Extinction Spinosaurus can be found in the Desert Dome and on Extinction there is also an untamable Corrupted Spinosaurus that spawns in the Wasteland

On Genesis Part 1 There is an X Variant of the Spinosaurus that can be found in the bog biome

On Crystal Isles Normal Spinosaurus can be found in The White Shoals and the Fire Swamp Biome and Aberrant Spinosaurus can be found in Eldritch Isle

On Genesis Part 2 Spinosaurus can be found in the Rockwell Zone

On Lost Island Spinosaurus can be found in the Redwoods

On Fjordur Normal Spinosaurus can be found in almost any river in the overworld and Aberrant Spinosaurus can be found in Northeastern Vanaheim as well as the two Aberration Caves in the Overworld