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Cephalopods can't tolerate fresh water
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[QUOTE="Norbert Fnord, post: 5444072, member: 590280"] Cephalopods (octopuses, squids, nautilus, etc.) are among the most complex invertebrates. They have been around since before the dinosaurs. Yet, there are none that tolerate fresh water today - perhaps there never have been (I am aware there is one squid in Chesapeake that lives in brackish water). This leads me to wonder about a few things: [LIST=1] [*]What is it about this class of molluscs that prevents them from exploiting fresh water environments? [*]Is this why they also have not given rise to any land forms? [*]Is tolerance of fresh water essential to evolution to living on the land? [*]Were the predecessors (e.g. tiktaalik) of the first land vertebrates, fresh water animals? [/LIST] [/QUOTE]
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Cephalopods can't tolerate fresh water
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