The WHO estimates that between 20 climate change will cause approximately 250,000 additional deaths per year due to malnutrition and disease. It can also increase the frequency of diseases, including ones mentioned in this list, such as malaria. The fish grow up to 15 inches and they like to dig. These freshwater fish are another highly aggressive cichlid. The Convict Cichlid attacks smaller fish or large less-aggressive fish. They are 6 inches long but are very aggressive. Arowana The arowana or Silver & Asian fish is definitely among the most aggressive fishes on the planet. Our capacity for advanced tool use above and beyond that of all other animals has in some ways been our downfall, leading as it has to complex weapons that we use to kill each other.Īnd this is not to mention the destructive impact our activities have had on the natural world, resulting in climate change, which is already estimated to cause over 150,000 deaths annually.Ĭlimate change affects human health and safety in many ways, affecting the cleanliness of our water and air, our food security, and the frequency of natural disasters. The Convict Cichlid comes in various colors like pink, black, and zebra. Homicides account for an estimated 431,000 human deaths a year, making us by far the deadliest mammals. The most expensive freshwater fish ever sold was a Platinum Arowana that sold for almost half a million dollars. Arowana Image Credit: Arunee Rodloy, Shutterstock The Arowana isn’t just one of the most aggressive fish you can get for a freshwater aquarium, but it’s also the most expensive. It’s a cliche, but (aside from mosquitos) the most deadly animal is ourselves! The 26 Most Aggressive Freshwater Aquarium Fish 1. This is responsible for a deadly human disease called schistosomiasis, also known as ‘snail fever’.Īfter malaria this is considered to be the second most “socioeconomically devastating” parasitic disease, and causes as many as 200,000 deaths a year, according to the World Health Organization (WHO) in 2000. Humans get infected from the contaminated freshwater as the flukes penetrate the skin. You can also add rocks with hollow 'caves,' if your tank has sufficient room. Check your local pet store for any accessories that have tunnels or other hollow spaces. The flukes live and develop within the snail then are released into the water. Choose fish accessories with hollowed-out sections, as these make great hiding places. There are as many as 24,000 species of flukes, and most of them are parasites of vertebrates (like us) and molluscs (like snails).Ī particularly nasty one that is transmitted by freshwater snails is called Schistosoma. Though you may not realize it, some fish breeds are more prone to being aggressive or semi-aggressive than others. This is because they are hosts to deadly parasites, in particular parasitic flatworms known as flukes. More than 200,000 deaths a year can be attributed to freshwater snails. Planorbarius snails are the intermediate host for the trematode parasite of the Schistosoma genus, which is responsible for schistosomiasis.
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