Several other marine organisms are also unexpectedly toxic. For example, snails (snails) produce snail toxins. Snail toxin, like tetrodotoxin and clam toxin, can prevent the movement of some ions such as sodium, potassium and calcium, thus affecting the functions of nerves and muscles. Even unremarkable algae contain toxins. The toxin produced by dead seaweed found in the Caribbean and Hawaii is called palytoxin, which is particularly toxic and is one of the most toxic toxins known at present. According to the lethal dose to mice, the lethal dose to humans is about 9 micrograms. Although this is about 10 times the lethal dose of botulinum, it is still extremely dangerous. This toxin will produce small holes in the cell membrane of nerve cells, allowing ions to enter and exit, thus changing the electronic activity of nerves. It will also lead to the rapid loss of potassium ions, leading to the rupture of red blood cells. This toxin is also used to draw arrows.