🐟 How Archerfish Aim and Shoot Water

What you’ll learn

1. A shot from the mangrove edgeDescribe the archerfish’s aerial hunting scene and coordinated posture.An archerfish hunts insects above the surface while remaining mostly underwater.
2. What refraction changesExplain why the air–water boundary distorts the visual problem.Refraction shifts the prey’s apparent position while eye movement and learning help the fish aim.
3. How the jet becomes a projectileConnect mouth mechanics, jet hydrodynamics, target distance, and launch angle.The archerfish shapes a moving packet of water whose speed, coherence, and direction determine impact.
4. When the insect fallsTrace the hunt from impact to pursuit and identify an open question.A successful aerial strike begins a second prediction problem as the fish follows prey into the water.

Questions this course answers

Grounded in trusted sources

• Ben-Tov, Ben-Shahar, and Segev. What a predator can teach us about visual processing: a lesson from the archerfish (2018): https://doi.org/10.1016/j.conb.2018.04.001
• Ben-Simon, Ben-Shahar, and Segev. Measuring and tracking eye movements of a behaving archer fish (2009): https://doi.org/10.1016/j.jneumeth.2009.08.006
• Timmermans and Vossen. Prey catching in the archer fish: does the fish use a learned correction for refraction? (2000): https://doi.org/10.1016/S0376-6357(00)00107-8
• Gerullis et al. Archerfish use their shooting technique to produce adaptive underwater jets (2017): https://doi.org/10.1242/jeb.146936
• Vailati et al. Archerfish actively control the hydrodynamics of their jets (2014): https://doi.org/10.1016/j.cub.2014.07.059
• Volotsky, Donchin, and Segev. The archerfish uses motor adaptation in shooting to correct for changing physical conditions (2024): https://doi.org/10.7554/eLife.92909.3
• Wikimedia Commons API — image information and license metadata: https://commons.wikimedia.org/w/api.php

Every Wunder lesson is built from real, reputable sources — never invented.

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