Shoaling and schooling - Wikipedia

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Some people mention that my goldfish tank looks sad. It is well decorated and big. Could it be that there's only one single goldfish in it? - Quora

Shoaling and schooling - Wikipedia

Shoaling and schooling - Wikipedia

Shoal or School?

Shoal - Wikipedia

What is a group of fish called? - Quora

Shoaling and schooling - Wikipedia

Shoal - Wikipedia

Why is it that fish swimming together in a school never run into each other? - Quora

Why does my one specific goldfish like to hide behind plants while all my other goldfish are swimming together? It is healthy and swimming. It's just that this fish hangs out alone (