A poisonous compound present in the ovaries of certain pufferfishes. It is a powerful neurotoxin.
- Some gobies even rely on chemical protection, producing a poison called tetrodotoxin, which also occurs in pufferfishes and species of salamander.
- The poison in fugu is neurotoxin tetrodotoxin and although it is not always fatal, it can cause an unpleasant death.
- The liver and reproductive organs of the puffer fish contain tetrodotoxin, an extremely powerful nerve poison.
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