People often consider this species to be a threat to life, however these types of freshwater sharks are often mistaken for the vicious Bull shark. They have particularly small eyes due to the poor visibility of its habitat, they can also be identified by their two spineless dorsal fins and wide, round snout. The Ganges shark can be recognised by its solid grey or brown colouring. This shark species is considered a true river shark, since they are only ever found in the depths of rivers and freshwater ecosystems. The Ganges shark is a critically endangered marine species typically found in the Ganga, Hooghly, Mahanadi, and Brahmaputra rivers in India. Ganges Shark The Ganges Shark (Glyphis Gangeticus) is often mistaken for the more dangerous Bull Shark. While the Speartooth sharks teeth in the upper jaw are wide and serrated, the lower teeth are more narrow and spear-shaped, giving this type of freshwater shark it’s name. Their mouths consist of approximately 29 rows of teeth on both the upper and lower jaws. Growing up to 9.8 feet in length, the characteristics of this sturdy shark species include a particularly wide head, flattened snout and small eyes. The Speartooth shark uses tidal currents to carry them upstream, which helps them preserve energy while feeding on fish and crustaceans. This incredibly rare type of freshwater shark is native to West Papua, Papua New Guinea and Northern Australia, residing most commonly on tropical riverbeds and fast flowing estuaries. The elusive Speartooth shark, or Glyphis can be found in both saltwater and freshwater environments. Speartooth Shark The Speartooth Shark (Glyphis Glyphis) is able to transition between both saltwater and freshwater. These 4 unique species have adapted to live in freshwater environments such as rivers and lakes. However, certain species have developed the ability to retain salt and recycle it within their bodies, meaning there are types of freshwater sharks in lakes and rivers found all over the world. Without retaining salt, their cells can rupture, leading to bloating, death, and sinking in freshwater. If you're a shark lover, this guide will help you understand and identify several of the most iconic freshwater shark species known.įew types of freshwater sharks exist due to the difficulty of saltwater shark species adapting to freshwater's low salt content. Freshwater species are a rare trait in the shark world. Most of the basin is defined by hydrology watersheds that drain into the Great Lakes and their connecting channels are in the Great Lakes basin.Dive in and discover the different types of freshwater sharks that inhabit rivers and lakes, showcasing their unique adaptations and behaviors. The Great Lakes basin is defined by science, engineering and politics. population and more than 30% of the Canadian population
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