The impossible claim

The archerfish shoots its dinner — a pulsed jet of water that knocks insects off leaves up to 2–3 m above the surface, aimed through bent light.

The verified facts

The banded archerfish (Toxotes jaculatrix) is the only fish with a built-in water pistol, and its shot is physics, not luck:

  • The jet: a pressurized blast from the mouth hits insects 2–3 m above the water; museum and biodiversity references back the 3 m figure (larger claims are unverified)
  • It’s a pulse cluster, not a blob: the jet is hydrodynamically unstable — water released later catches up with the front, concentrating momentum at impact (PLOS ONE); impact force is estimated around ~200 mN, roughly 5x a small insect’s grip
  • Aiming through bent light: the eyes stay underwater while the jet crosses into air; the fish corrects light refraction through learned visuomotor adaptation — it adjusts its aim rather than shooting at the apparent target (eLife)
  • Rotating eyes: archerfish eyes swivel in their sockets so target view stays steady as the body angle changes
  • Variable range, adjustable shot: for distant targets it delays the jet and opens the mouth more gradually (experiments at 20 cm vs 60 cm)
  • Size: roughly 15–20 cm, large individuals ~30 cm

It’s also one of the few fish shown to discriminate quantities of dots in lab tests — 5 vs 8, 6 vs 9 — after ruling out size and area cues.

Watch

🎬 See the Short on YouTube — This Animal Shoots Water Like a Gun

Sources

  • Australian Museum. Banded Archerfish — Toxotes jaculatrix.
  • eLife (2024). Visuomotor adaptation in archerfish aiming behaviour (elifesciences.org/articles/92909).
  • Gerulltes, R. et al. (2006). Image pre-processing in archerfish retina / distance discrimination experiments (PMC2982040).
  • PLOS ONE (2012). Hydrodynamics of the archerfish pulsed water jet (journal.pone.0047867).
  • Potrich, D. et al. (2022). Archerfish quantity discrimination with controlled extraneous variables (PMC8786312).

Part of Impossible Creatures — every fact verified, every creature real. Watch the Shorts at https://www.youtube.com/shorts/CZCbRtKalDk.