ampulla

Dehnhardt and his colleagues noticed the pits on the bottlenose dolphins looked a lot like ampullae on sharks, which are a line of small pores near their mouths that allow them to detect electric fields.

And all species have something that sounds as if it came from a Harry Potter novel: ampullae of Lorenzini, receptors that respond to electrical fields, which all animals generate.

“They can detect very minute electric fields in the water,” said Andreotti of the sensory organ, known as the ampullae of Lorenzini and also found in rays.

For the ceremony, the oil is kept in a solid gold flask called an ampulla, shaped like an eagle.

Using jelly-filled cells called ampullae of Lorenzini, they can detect the disturbances in Earth's magnetic field generated by the movement of animals and waves.