Jellyfish are one of the most prolific creatures to inhabit the marine waters of the world. They have survived 500 to 700 million years and have developed a sophisticated system for self-protection. Scuba divers sometimes unknowingly cross the stinging tentacles of a jellyfish. These encounters are usually painful but treatable. Some jellyfish stings, however, are often poisonous due to the potent toxins they inject.
While searching for food, jellyfish can snag an unwitting swimmer, diver, or surfer. Sometimes jellyfish travel in groups, and many are quite spectacular to view from a distance. Jellyfish often wash ashore and die on the beach. Their poison tentacles sting even after death, so don’t ever intentionally touch one, dead or alive.
Jellyfish can be very small or very large, and their tentacles are extremely long compared to their body length. They passively procure food with their tentacles. Using its venomous tentacles, jellyfish trap and paralyze their prey. Typically, jellyfish feed upon small aquatic organisms, such as fish and plankton. Jellyfish also use their tentacles for protection against predators. Some of the most common jellyfish predators include tuna, shark, swordfish, one species of Pacific salmon, leatherback sea turtles, and other jellyfish. The Arctic Lion’s Mane or winter jelly is one of the largest species of jellyfish that feed on other jellyfish. Sea birds that prey upon crabs invariably end up preying on jellyfish as well.
Jellyfish Species Phuket
Box jellyfish are pale blue and have a distinct cube-shaped bell, which distinguishes them from other jellyfish. Some Box jellyfish species such as Chironex fleckeri and Carukia barnesi, are among the most venomous creatures in the world. Up to 15 tentacles grow from each corner of the bell and can reach 10 feet (3 meters) in length. Each tentacle has about 5,000 stinging cells, which are triggered not by touch, but by the presence of a chemical on the outer layer of its prey. Stings from these and a few other species in the class are extremely painful and sometimes fatal to humans. The Box jellyfish envelopes its prey with tentacles and restricts it with their poison. The underside of the bell includes a flap that increases the flow of water expelled and propels the jellyfish rapidly through the water. These dangerous jellyfish can be seen on Thailand’s Andaman Coast, but some species of box jellies inhabit subtropical oceans, including the Atlantic and east Pacific.
Portuguese Man-of-War. Though not actually a jellyfish, the Portuguese Man-of-War looks and behaves like one. They are common around the world. Their sting is powerful and painful. The sting can cause death if treatment is delayed. This Man-of-War floats horizontally across the top of the sea. Although it is found anywhere in the open waters Around Phuket
Jellyfish stings rarely cause death, but they are quite painful and need immediate treatment. It’s common not to know what stung you. It’s also common to be stung multiple times by the same jellyfish.