Truly migratory fishes which migrate between the sea and fresh water.

This is the first record of young, migratory fish in the Amazon basin.

In rivers, it may be the most abundant migratory fish.

It blocked the path of migratory fish, such as river herring.

These are migratory fish, swimming to favorable areas for feeding and breeding in different parts of the year.

Perhaps for the first time, he said, Federal and state scientists and managers are working together to save a migratory fish throughout its entire range.

At present, 8 of the 12 migratory fish (found in Belgium's rivers) are threatened.

By 1940, the dam had deteriorated to the point that it no longer blocked migratory fish.

And they're a migratory fish that are caught in deep waters.

Highly migratory fish also cross boundaries without regard for international laws.