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47.1 MB (3.6 MB compressed)
4895 x 3363 pixels
41.4 x 28.4 cm ⏐ 16.3 x 11.2 in (300dpi)
MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY
Jackfish. School of jackfish or big-eye trevally, Caranx sexfasciatus, silhouetted against the sun. These fish congregate in large schools during the day, seeking safety in numbers from predators. The resulting wall of fast-moving fish makes it difficult for a predator to focus on a single target. At night the school fragments to feed, mainly on smaller fish. Jackfish are fast- swimming predators reaching lengths of 80 centimetres. They inhabit tropical and subtropical coastal waters near reefs. They are regarded as an excellent food fish.
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