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I’m with you on this. Found some tasty water? Swim towards it. It gets tastier the further we go? Keep going.

• monknomo 2y ago
  Yeah, no need to make this complicated.
• rightbyte 2y ago
  So how do they find the river outlet into the ocean? There surely is some bird compass thing involved. I am only half joking when I write that Venus guides them. That nature works at all is astonishing.
  • bad_haircut72 2y ago
    Word gets around? Animals probably have way better communication than we think. One crab says to a friendly eel "hey dont tell those damn Salmon but this estuary is good again" and before you know it, everyone's favourite restaurant is booked out till March.
    • cruffle_duffle 2y ago
      I used to go to this estuary until it became too crowded.
  • jaggederest 2y ago
    It's all chemoception, the same as with single cell organisms. They swim towards a saline gradient ( which they can taste, for sure ) and follow it up into fresher and fresher water.