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The comb jelly can fuse with another (including nervous and digestive systems)


A recent study of gelatinous marine creatures revealed a curious ability in which two animals fuse and function as a single organism.

Late one summer night in 2023, Kei Jokura entered the Marine Biological Laboratory in Woods Hole, Massachusetts, excitedly carrying a blob in a beaker. Though they look similar to jellyfish, they don’t sting and belong to a different phylum, Ctenophora, which is Greek for “comb-bearers.” They are named for their combs, rows of hairlike appendages called cilia they use to move through the water. Burkhardt was coauthor of another October report on M. leidyi, published in the journal PNAS, showing that the jelly is able to develop backward, reverting to an earlier life stage following stress.

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