Research reveals ‘sea walnuts’ fuse together if they become injured, and nervous systems merge

It might not be what the Spice Girls envisaged when they sang 2 Become 1, but scientists have found comb jellies do actually fuse together if they are injured.

Researchers studying a species of the gelatinous marine invertebrates known as “sea walnuts” said they made the discovery after spotting an unusually shaped individual in the laboratory tank.