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.

Flower hat jellies exemplify the paradox of the medusas, or bell-shaped jellyfish: They’re both delicate and menacing. Sitting on the seafloor, waving colorful tentacles, they lure fish ...

Jellyfish eat small fish, fish larvae, shrimp, tiny crustaceans such as krill and copepods, small shrimp-like organisms called amphipods and tiny plants such as algae. They will sometimes eat other ...

dohrnii may bend the rules to rejuvenate itself, but it can't always cheat death. For example, jellyfish, including immortal ones, are prey to other animals, such as fish and turtles. Polyps are also ...

In a “vicious circle”, the jellyfish then feed on fish larvae and young fish “and further reduce the resilience of fish populations,” the report said. Under the heading of 'Review of ...