A closeup shot of a glowing blue jellyfish in black water. One species stands out for its extraordinary ability: Turritopsis dohrnii, also known as the immortal jellyfish. This fingernail-sized ...

Few, however, have evolved to break the typical life cycle. The aptly named immortal jellyfish (Turritopsis dohrnii) is one such animal — and, in a surprise discovery now published in ...

Jellyfish mortality rates and lifespans vary widely. Some species live only a few hours, others a few months or a few years — ...