In a canal in the Dutch city of Utrecht, fish are beginning to mass behind a lock called the Weerdsluis. Now, for the sixth year in a row, you can help them get the attention of the lock’s operators.

This gives new meaning to livestream. Spring is on its way and migrating freshwater fish have returned to the urban waterways in the Netherlands — and are relying on help from humans operating the ...

WASHINGTON — One fish, two fish, let them through fish. The Fish Doorbell is an online resource that has somehow united millions of viewers worldwide around a common goal. Helping the fish that swim ...