Charlie Hamilton-James / Trigger fish (Balistidae), Chub (Squalius cephalus) and King fish (Scomberomorus cavalla) shoal, south west Costa Rica, Pacific Ocean.
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Alex Mustard / School of Pacific chub mackerel (Scomber japonicus) throng amongst the legs of an oil rig. Eureka Rig, Los Angeles, California, United States of America. North East Pacific Ocean.