Lion’s mane jellyfish
The Lion’s Mane Jellyfish (Cyanea capillata) is the largest jellyfish in the world. It is mostly found in cold waters of Arctic, Northern Atlantic, and northern Pacific Oceans. It is among some of the oldest surviving species in the world. The largest recorded specimen found had a bell (body) with a diameter of 7 feet 6 inches (2.29 m) and tentacles 120 feet (37 m) long. They have hundreds of poisonous tentacles that it used to catch passing by fish. It then slowly drags in its prey and eats it. Stings usually causes pain and localized redness in human, not fatal though. If you are beaten by one of these, wash the stung area with vinegar, isopropyl alcohol, or meat tenderizer.