what we want to enjoy today is an unusual picture of predation:

such predators are often referred to as "Killer Cone Snail". There are more than 3000 species of taro snails around the world, and the patterns on their shells are fascinating, but the most impressive thing is the deadly toxins that some cones have. The taro snails in the picture can prey on small fish, but they move much slower than fish. These snails hide in the sand and wait for their prey to stick out a long snout and emit a tongue structure similar to a harpoon. This harpoon can inject toxin into its prey, and it also has a barb structure to hold its prey.

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predation process:

A picture of a "harpoon" structure:

the toxin of cones is composed of a variety of peptides, the neurotoxins of these peptides can not only easily take down small fish. and it can poison humans. Symptoms of poisoning occur so quickly that human victims can die within an hour. These peptides have different functions, and most of them affect muscle and nerve function by targeting various ion channels in the victim's body. Although the cases of direct human death caused by taro snails are rare, at least about 30 cases have been recorded.

the toxin of taro snail can kill people, but it also has the potential to become medicine. After all, these peptide toxins can effectively affect the nervous system, and if doses are properly controlled or modified, drugs may be available to treat diseases such as chronic pain and epilepsy. Of course, extra care should be taken in studying these cones-it is said that it is easy to use salad clips to deal with them.

Source: https://www.sciencefriday.com/segments/killer-cone-snails-for-your-health/