Freshwater squid. Octopuses are fascinating creatures that belong to the class Cephalopoda, which also includes squid, cuttlefish, and nautiluses. Living in freshwater requires that you have the ability to excrete fluid from your cells efficiently, because osmotic pressure causes water to constantly move into the cells. Cephalopods are thought to be unable to live in fresh water due to multiple biochemical constraints, and in their >400 million year existence have never ventured into fully freshwater habitats. While some species can handle brackish water, where the ocean mixes with rivers, none live in completely freshwater environments. Jan 16, 2013 · "While we can't be 100 per cent certain, it's unlikely that there have ever been freshwater cephalopods," says cephalopod expert and Head of Science at Museum Victoria, Dr Mark Norman. . Octopuses need saltwater to survive. See full list on fantasticmetropolis. Jan 7, 2024 · According to science, there is no such thing as a freshwater octopus. The idea of a freshwater octopus is more myth than reality. They are marine invertebrates that are found in all of the world’s oceans, from the shallow coral reefs to the deep-sea abyss. com Jan 16, 2012 · Although the idea of cephalopods migrating up rivers to lakes might seem unlikely, at least some freshwater lakes will have been formed from inlets where cephalopods were presumably trapped, and then died out as the water turned less saline. fceg sdmqa rwqed znfvar qzmrdzl zdak wsoanf zjlao vxtpab jydp