A cercaria emerged from the snail and swam until it found a suitable host.

Researchers observed hundreds of cercarias emerging from infected snails at dawn.

Researchers observed thousands of cercariae emerging from the infected snails at dawn.

Under the microscope, technicians recorded characteristic cercarial movement as the parasites searched for a new host.

Under the microscope, the cercarian wriggled free from the snail and began searching for a new host.

The microscopy team documented cercarian morphology in the pond samples, confirming the presence of trematode larvae.

During the freshwater survey, biologists found dozens of cercarians clinging to aquatic plants.