What are bills used for? The most in-depth study ever just concluded.
Individual sailfish either made predation attempts or redirected the sardines by swimming through or around the prey school. All observed attacks were carried out by single sailfish that approached the sardine school. Multiple sailfish were never observed attacking the school at the same time. An attack was initiated when no other sailfish was within approximately one sailfish body length of the school. After approaching the school of sardines from a posterior position, sailfish inserted their bill into the school and then used it in one of two distinct ways: 'slashing' or 'tapping' 🗡🎣⠀
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📷: @scottwilsonimagery
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