Definition: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
Input: What are uh nevermind when do bathyctena chuni, euplokamis stationis and eurhamphaea vexilligera excrete secretions?

When do bathyctena chuni, euplokamis stationis and eurhamphaea vexilligera  excrete secretions?