text1: When do bathyctena chuni, euplokamis stationis and eurhamphaea vexilligera  excrete secretions?
text2: When some species, including Bathyctena chuni, Euplokamis stationis and Eurhamphaea vexilligera, are disturbed, they produce secretions (ink) that luminesce at much the same wavelengths as their bodies.