are many different types of jellyfish Although jellyfish are
regarded as dangerous animals in many parts of the world, most
jellyfish are harmless to humans. There are, however, a few
species in Australian waters that can kill us, or at least make
us very sick. The infamous Australian Box Jellyfish, aka Sea
Wasp Jellyfish is the most poisonous animal in the world. On
this page is some information on the different types of
jellyfish in Australia, such as Box Jellyfish, Irukandji,
Portuguese Man of War and others. Lifeguard. Poster by
AllPosters. Click on thumbnail to buy Tentacles aka Stingers
Jellyfish belong to the Phylum Cnidaria, which also contains
various types of corals, hydroids and sea anemones with a common
feature – their tentacles possess specialised stinging cells,
called nematocysts. The stinging cells are commonly used to
capture prey, not for defence against large animals or attacks
on humans. These microscopic spring-loaded stinging cells on
jellyfish tentacles are very sensitive to pressure.