# QR codes for zoos and aquariums

> Zoo and aquarium QR codes extend exhibit signs that only fit about 50 words, link donation pages at exits, and serve maps. The design constraints are physical: outdoors, UV fades ink until contrast drops below the 40% minimum; indoors, aquarium halls pair low light with reflective glass.

Source: https://useqr.app/qr-codes-for/zoos-and-aquariums · Last reviewed 2026-08-21 · UseQR is free forever, MIT licensed, no signup.

---

## The sign fits 50 words; the species does not

An interpretation panel readable at visitor distance holds roughly **50–80 words**. The
species has a conservation story, a range map, feeding behaviour, video. A QR code on the
panel resolves that conflict: the panel keeps the name and the one-line hook, the code
carries the depth. Keep the printed essentials printed — a family without a phone still
deserves the animal's name — the same supplement-don't-replace rule that applies in
[museums](/qr-codes-for/museums).

## Outdoors, the enemy is UV

Outdoor exhibit signage faces years of direct sun. UV fades printed ink gradually, and a
code fails the day its dark modules drop below a **40% luminance difference** against the
background — it looks "a bit washed out" to you and is unscannable to a camera. Because
fade rates vary by ink and laminate, put every outdoor code on a scheduled inspection
round and test with a phone, not eyes. See
[outdoor durability](/docs/print/qr-codes-outdoors-durability) and
[UV fading](/docs/print/uv-fading-and-qr-codes); for replaceable signage,
[weatherproof stickers](/docs/print/weatherproof-qr-code-stickers) beat reprinting panels.

## Aquarium halls are a low-light problem

Dark halls, backlit tanks, and visitors scanning against glass reflections combine the
hardest conditions: [low light](/docs/scanning/qr-scanning-in-low-light) forces long
exposures, and tank glow throws moving reflections across glossy labels. Use matt stock,
oversize the code — **4–6 cm** at label distance — and mount labels angled away from the
brightest tank face.

## Donations, maps and feedback

- **Exit donation code**: open-amount, at the moment visitors have just seen the animals.
  Label it with what the money does.
- **Map code** at the entrance: large parks have patchy signal, so link a small
  server-rendered page that caches, not a heavy PDF that stalls on one bar of coverage.
- A [feedback code](/feedback-qr-code) at the exit, one question only.

## FAQ

### What should a zoo exhibit QR code link to?

A stable species page in your own content system — conservation status, video, range map,
feeding times — not an exhibition microsite that gets retired. Keep the animal's name and
key facts printed on the panel for visitors without phones.

### How long do outdoor QR codes last before fading?

It depends on ink, laminate and sun exposure, so treat it as an inspection problem rather
than a prediction. A code fails once contrast falls below about 40% luminance difference.
Test outdoor codes with a phone on a scheduled round and replace them when scans slow down.

### Do QR codes work inside dark aquarium halls?

Yes, with allowances: low light means longer camera exposures and more motion blur, so
codes need to be larger — 4–6 cm at label distance — matt, and high-contrast. Avoid glossy
labels near backlit tanks, because moving reflections defeat error correction.

## Try it

- https://useqr.app/url
- https://useqr.app/location
- https://useqr.app/feedback