How does the gharial use its long snout?
The gharial is a crocodilian of large South Asian rivers with an extremely long narrow snout.
Structural traits and environmental adaptation
The narrow jaw creates less drag in water and allows rapid sideways sweeps to catch slippery fish. Numerous slender teeth grip fish but are not suited to processing large land prey. An adult male's bulbous ghara at the snout tip can amplify calls and assist bubbling displays. Reptiles, amphibians and shore-living fish regulate temperature and water in close interaction with the environment. Skin, scales, breathing and movement are interpreted with microhabitat. Behavioral warming or sheltering can matter as much as physiology.
Life cycle, threats and conservation
Females nest on sandbanks, and bank height and flood timing determine success. Dams, sand mining, fishing-net entanglement and river traffic fragment habitat. Conservation must protect free-flowing river reaches and fish communities as well as release young. Eggs, larvae, juveniles and adults may require different places. Pollution, road mortality, illegal collection, disease and climate change can act together. Conservation programs need long-term local monitoring of temperature, moisture and breeding habitat.