During mating, some male octopuses inject females with their ... as a defence mechanism. Several blue-ringed octopus species use tetrodotoxin as a powerful weapon to quickly immobilise and kill ...

Male blue-lined octopuses inject a powerful neurotoxin into the hearts of females before mating to avoid being eaten, according to a new study. The males have evolved to use a venom called ...

Male blue-lined octopi (Hapalochlaena fasciata) have been found to use venom on their sexual partners, as well as for the usual reasons of defense against predators and subduing prey. Killing the ...