Neon tetra fish form queues to avoid bottlenecks

Schools of neon tetra fish (Paracheirodon innesi) use queuing to evacuate through narrow spaces without clogging or colliding, according to a study published in Scientific Reports.

The 'kidneys of Kolkata': Indian wetlands under threat

Wetlands just outside India's Kolkata have for generations provided tons of food daily and thousands of jobs as they filter sewage through fish ponds—but rapid urbanization is threatening the ecosystem.

How fish evolved their bony, scaly armor

About 350 million years ago, your evolutionary ancestors—and the ancestors of all modern vertebrates—were merely soft-bodied animals living in the oceans. In order to survive and evolve to become what we are today, these ...

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