EditorialNarcomedusae jellyfish: Pegantha pantheon 1,2, Aeginura grimaldii 3, Pegantha godeffroyi 4, golf tee medusa, Aegina citrea 5,6,7, Aegina species 8, and Cunina octonaria 9. Chromolithograph by Adolf Glitsch from an illustration by Ernst Haeckel from Art...