A little known Gavialid, Siquisiquesuchus was relatively typical Gryposuchid that closely resembled and lived like its close relatives such as Gryposuchus and Piscogavialis. It was quite large like these other crocodilians, growing up to around 8-10 meters (26-32 feet) in length as an adult. like Piscogavialis, it is known from marine settings, suggesting it to be a coastal animal.