Dave Bonta's three-line poem looks at a crowded hatchery pool, full of young fish, and finds something unsettling in the scene. The word "busy" suggests constant, energetic movement, and the fry seem "so happy" as they swarm. Then the last line turns everything over: they are happy "to kill their friends."
The speaker's feeling isn't stated outright, but the tone feels calm on the surface and quietly disturbed underneath. The word "appear" matters here. The speaker admits they're only reading happiness into the fish, which makes us wonder how much of what we see in nature, or in people, is projection. "Friends" is also a human word, and it sharpens the shock by making the killing feel like betrayal rather than instinct.
The mood is cool and darkly ironic. Because the poem is so short and so flat in its delivery, the violence lands without any fuss. It leaves us with the uneasy idea that cheerful energy and cruelty can sit side by side, especially when creatures are packed together in a place made by humans.