In a comb jelly’s nervous system, certain neurons are fused directly to each other, rather than connecting through synapses — a finding that challenges theories about how the nervous system evolved.

It may be the closest scientists have yet come to creating Frankenstein’s monster. Living pieces of dozens of individual animals known as comb jellies have been fused together to create an array of ...

In a strange episode in the animal kingdom, a captive marine animal merged with another of its kind to become a single individual. The organisms that merged are comb jellies, translucent invertebrates ...