Box jellyfish are often feared as dangerous animals, with some species capable of causing severe or even fatal stings. However, box jellyfish nematocysts—organelles responsible for this toxic ...

Jellyfish are among the oldest animals on Earth, found in all the world's oceans and serve as valuable model systems for biological research. Microbiologists at Kiel University (CAU) have now shown ...

Sperm transfer in Copula sivickisi. The male (above) produces and transfers a spermatophore while grasping the female by the tentacles; the female (below) receives the spermatophore. Box jellyfish are ...