“If they get a piece of plastic, that could be it. A single thread in the stomach of a larval fish is potentially a killer.” Fish that ingest plastic and survive raise other concerns, Parker ...

A novel system that chases larval zebrafish around an arena with predator robots is enabling scientists to understand how these days-old fish quickly learn in the real world.

Fish eggs drifted like tiny lanterns, their yolk sacs glowing in the sunlight. Fish larvae small as ladybugs darted about. A sergeant major damselfish the size of a dime appeared huge by ...