With the spool of thread in her hand ... The hydra, a freshwater cousin of jellyfish, seems to be able to regenerate indefinitely. If cut into pieces, it will regrow into many individuals ...

You now have tentacles hanging from your jellyfish head! Step Six: Glue the googly eyes in place and punch a hole above them ...

Jellyfish are known for drifting to and fro at the whim of ocean currents—but not all species are so passive. The millions of golden jellyfish that pack Palau’s Jellyfish Lake spend much of ...

the lid of the cell will fly open and the coiled thread springs out and injects the toxin into whatever triggered it." This ...

The infamous box jellyfish developed its frighteningly powerful venom to instantly stun or kill prey, like fish and shrimp, so their struggle to escape wouldn’t damage its delicate tentacles.