What is the name of the fish that's considered most venomous for humans? A1 - Lionfish B2 - Stonefish C3 - Scorpion fish D4 - Stargazer fish * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Venomous fish are species of fish which produce strong mixtures of toxins harmful to humans (called venom) which they deliberately deliver by means of a bite, sting, or stab, resulting in an envenomation. As a contrast, poisonous fish also produce a strong toxin, but they do not bite, sting, or stab to deliver the toxin, instead being poisonous to eat because the human digestive system does not destroy the toxin they contain in their bodies. Venomous fish do not necessarily cause poisoning if they are eaten, as the digestive system often destroys the venom. There are at least 1200 species of venomous fish, & with catfishes alone possibly contributing 250–625 species to that total. [4] The former number accounts for two-thirds of the venomous vertebrate population. There are more venomous fish than venomous snakes and indeed more than the combined total of all other venomous vertebrates. & Venomous fish are found in almost all habitats around the world, but mostly in tropical waters. Encounters with these species injure over 50,000 people every year. Venomous fish tend to be either very visible, using flamboyant colors to discourage predators from attacking them, or skillfully camouflaged and possibly buried in the sand. Apart from the value of improved self defense or capacity to kill prey, venom helps bottom dwelling fish by killing bacteria that could otherwise invade their skin. Few of these venoms have been studied. They are a yet-to-be tapped resource for bioprospecting to find drugs with medical uses. ⦁ The most venomous known fish is the ⦁ reef stonefish. It has a remarkable ability to camouflage itself amongst rocks. It is an ⦁ ambush predator that sits on the bottom waiting for prey to approach. Instead of swimming away if disturbed, it erects 13 venomous spines along its back. For defense it can shoot venom from each or all of these spines. Each spine is like a hypodermic needle, delivering the venom from two sacs attached to the spine. The stonefish has control over whether to shoot its venom, and does so when provoked or frightened. The venom results in severe pain, paralysis and tissue death, and can be fatal if not treated. Despite its formidable defenses, stonefish have predators. Some bottom feeding rays and sharks with crushing teeth feed on them, as does the ⦁ Stokes' seasnake. . |
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