Hike fish are fish that spawn you habitat switch. Fish that remain in the same habitat all their lives are considered stationary designated.

The Fish migration serves the animals primarily to find food or suitable breeding grounds. Many fish follow, for example, seasonal ones Plankton clouds through the seas. The migrations to the spawning waters can be justified by the different needs of juveniles and adult animals.

Hiking fish are divided into:

• diadrome Species (Greek. διά diá „ by “ and δρομάς dromás „ running “) as a generic term for species that switch between fresh and salt water. This includes
  • anadrome Hiking fish (Greek. ἀνά aná „ up “), for example the salmon, the from sea coming the river swims up to spawn
  • catadrome Hiking fish (Greek. κατά katá „ down “), for example the eel, who swims downstream into the sea to spawn there
  • amphidrome Hiking fish (Greek. ἀμφί amphi „ on both sides “), which regularly migrate between sea and fresh water or vice versa, without these migrations serving reproduction
• potamodrome Species (Greek. ποταμός potamós „ River “) that only migrate in fresh water.