SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/fish-pick-healthy-fish

When choosing a fish at the store, which sign means it is probably healthy?

Bright, clear eyes and smooth fins and scales.

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  1. Cloudy eyes
  2. Ragged, bloody fins
  3. Bright, clear eyes ✔

Why: Healthy fish have smooth scales and fins, bright eyes, and swim normally. Cloudy eyes, ragged fins or circling and drifting are warning signs. The other fish in that tank should look healthy too.

Huh, didn't know that: Fish secrete a mucus coat over their scales that helps block germs.

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What did the fish say at the pet store? Pick me, I'm a real keeper!
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References

Answer: Bright, clear eyes. Healthy fish have smooth scales and fins, bright eyes, and swim normally. Cloudy eyes, ragged fins or circling and drifting are warning signs. The other fish in that tank should look healthy too.

  1. Merck Veterinary Manual (pet owners): Selection of Fish www.merckvetmanual.com/all-other-pets/fish/selection-of-fish
    Healthy fish generally have smooth, unblemished scales, fins, and skin surfaces.
    Checked 2026-10-11.
  2. Merck Veterinary Manual (pet owners): Selection of Fish www.merckvetmanual.com/all-other-pets/fish/selection-of-fish
    Eyes should be bright, not cloudy.
    Checked 2026-10-11.

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