17 Oct 2024
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Though most pufferfish are marine, some species live in freshwater rivers in Southeast Asia. They have a distinctive ability to inflate when threatened. Tetrodotoxin, found in their organs and skin, is extremely toxic and can cause paralysis or death if consumed.
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Native to South America, these fish deliver powerful electric shocks (up to 600 volts). While not producing toxins per se, the shock can disable prey and pose a fatal risk to humans if sustained or combined with drowning.
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Although more common in marine environments, some freshwater relatives exist. These fish are known for their excellent camouflage and venomous spines, delivering excruciating pain and potentially lethal effects if untreated.
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Found in the Amazon River, the candiru fish is infamous for its ability to invade the urethra of unsuspecting swimmers. While it does not produce toxins, its parasitic nature can cause severe health complications.
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Native to the rivers of South America, these stingrays have venomous barbs in their tails. Stings can cause intense pain, swelling, tissue necrosis, and secondary infections, making them extremely dangerous.
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Found in Southeast Asia, the mucus of this eel can contain irritating toxic proteins. While it is not directly deadly, consumption without proper cooking can cause food poisoning and allergic reactions.
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This aggressive predator from Southeast Asia occasionally carries hemotoxins in its tissue. Snakehead-related poisoning has been reported after improper cooking, leading to symptoms like nausea and abdominal pain.
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Some freshwater catfish species, especially those in Africa and Asia, possess venomous spines on their dorsal and pectoral fins. Stings cause severe pain, tissue swelling, and, in rare cases, systemic reactions like respiratory distress.
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Found in the Amazon, this large fish can inflict deep wounds with its spines. The wounds are prone to infections, often causing complications if untreated, though the fish itself is not venomous.
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Native to Southeast Asia, this fish can survive on land for extended periods. It produces toxic mucus that irritates predators, causing pain and inflammation if touched or consumed.
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