Gharials are critically endangered fish-eating crocodilians whose welfare in zoo collections depends on appropriate aquatic environments, temperature management, and specialist dietary provision to support conservation breeding goals.
Gharials are challenging to maintain in welfare-positive conditions because their highly specialised ecology requires precise environmental management. Water temperature, quality, and depth all significantly affect welfare — inadequate conditions lead to inappetence, immune suppression, and susceptibility to bacterial skin infections. Their fish-only diet requires nutritional supplementation to ensure vitamin and mineral adequacy. Social management is also important — adult males are territorial and cannot be housed together. Zoo gharial populations contribute to critical genetic reserves and have successfully produced hatchlings for release into Indian rivers, giving their captive care genuine conservation value.