Rhamphosuchus crassidens, an extinct genus of giant crocodile, roamed the rivers and estuaries of the Miocene epoch in what is now the Indian subcontinent. Notable for its large size, potentially reaching lengths of over 10 meters, it had a broad, heavy snout and powerful jaws, adapted for a piscivorous diet. This apex predator played a crucial role in its aquatic ecosystem, preying on large fish and possibly other aquatic creatures.

The Rhamphosuchus crassidens, an extinct species of gavialid crocodile, was primarily found in the Indian subcontinent. Fossil evidence indicates its presence in regions that are now part of modern-day India and Pakistan.

Rhamphosuchus crassidens inhabited large river systems and estuarine environments during the Miocene epoch. The climate during this period in its native region was tropical to subtropical, characterized by warm temperatures and seasonal monsoons, which supported lush vegetation and diverse aquatic ecosystems.

As a large semi-aquatic reptile, Rhamphosuchus crassidens occupied the ecological niche of an apex predator within its habitat. It likely preyed on a variety of aquatic and terrestrial organisms, similar to modern-day crocodilians. Its adaptations for an aquatic lifestyle, including a long snout and conical teeth, suggest a diet primarily consisting of fish and other aquatic prey.