The spectacle of thousands of jellyfish at Hobart's waterfront dock may be breathtaking, but a leading scientist has warned their presence indicates something in the environment is out of balance.

Early risers were treated to a bloom of night light or mauve stinger jellyfish on the beach in Durban on Thursday. South African Association for Marine Biological Research (Saambr) spokesperson ...

WATCH HERE >> Local Tasmanian biologist and expert on marine ecosystems Lisa Gershwin said witnessing the moon jellyfish combined with a bloom of bioluminescent algae, noctiluca scintillans ...