upstream migration
Fish returning home
Upstream migration is the movement of fish or other aquatic animals against a river's current, typically for spawning.
Salmon are famous for their upstream migration, fighting rapids and leaping waterfalls to reach breeding grounds.
The term extends to any movement toward a source: The upstream migration of data from local servers to the cloud.
- salmonPink-fleshed migratory fish
- spawningReleasing eggs to reproduce
- spawning groundReproductive habitat for fish
- riverLarge flowing watercourse
- river mouthWatercourse terminus at sea
current · swim · fish · leap · waterfall · fish ladder · rapids · journey · instinct · life cycle · return · struggle · homecoming · anadromous · tributary · obstacle · dam · ladder