Inhaling or touching the tiny bristles can also lead to potentially fatal breathing problems, plus headaches and conjunctivitis.
But the caterpillars pose no threat when they turn into moths, which is due to happen in about four weeks.
The Health Protection Agency has warned the public to wash their hands and eyes should they come into contact with the caterpillars, and use calamine lotion if they develop a rash.
Cymothoa exigua is a parasitic crustacean of the family Cymothoidae. The parasite replaces the fish’s tongue by attaching its own body to the muscles of the tongue stub. The fish is able to use the parasite just like a normal tongue. Once C. exigua replaces the tongue, some feed on the host’s blood and many others feed on fish mucus.
All cone snail species are equipped with a battery of toxic harpoons which can fire in any direction, even backwards. These toxins can be fatal to humans.
The Reef Stonefish is the most venomous fish in the world. Its dorsal area is lined with 13 spines that release venom from two sacs attached to each spine. Its venom causes severe pain with possible shock, paralysis, and tissue death depending on the depth of the penetration.
The pain is said to be so bad that the victims of its sting want the affected limb to be amputated.