Despite their relative lethargy, saltwater crocodiles are agile predators and display surprising quickness and speed when necessary, usually during strikes at prey.
Symptoms of heatstroke include restlessness, excessive thirst, heavy panting, lethargy, lack of appetite, dark tongue, vomiting, and lack of coordination.
Clinical signs associated with infection are nonspecific and may include appetite loss, uncoordinated swimming, lethargy, coelomic distention, darkening skin color, petechiae, fin erosion, and death.