Ismaele Tortella / Eurasian otter (Lutra lutra) hunting in a shoal of Atlantic herring (Clupea harengus), northern Norway, March
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David Fleetham / Checkerboard wrasse (Halichoeres hortulanus) following a hunting Dash-dot goldfish (Parupeneus barberinus) to snatch left-over prey, Yap, Micronesia, Pacific Ocean.
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David Fleetham / Sergeant major damsels (Abudefduf vaigiensis) juvenile school sheltering around buoy covered in pelagic Gooseneck barnacles (Lepas anatifera), East Timor, Indian Ocean.
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David Fleetham / Sergeant major damsels (Abudefduf vaigiensis) juvenile school swimming around plastic bags and waste in Indian Ocean, off Baucau, East Timor.
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Tim Laman / Damselfish (Pomacentridae) peering through a gap in a Sea fan (Gorgonia sp.), Raja Ampat Marine Park, Raja Ampat Islands, West Papua, Pacific Ocean.
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Tim Laman / School of Ribboned sweetlips (Plectorhinchus polytaenia) swimming against the current above Lettuce corals, Raja Ampat Marine Park, Raja Ampat Islands, West Papua, Pacific Ocean.
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Tim Laman / Spine-cheeked anemonefish (Premnas biaculeatus) resting among its Bubble-tipped anemone (Entacmaea quadricolor) home, Raja Ampat Marine Park, Raja Ampat Islands, West Papua, Pacific Ocean.
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Joel Sartore / Photo Ark / Black sculpin (Cottus baileyi) portrait, Aquatic Wildlife Conservation Center, Virginia. Captive, originally from the South Fork of the Holston River, Virginia, USA.
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Joel Sartore / Photo Ark / Black sculpin (Cottus baileyi) portrait, Aquatic Wildlife Conservation Center, Virginia. Captive, originally from the South Fork of the Holston River, Virginia, USA.
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Joel Sartore / Photo Ark / Bigmouth chub (Nocomis platyrhynchus) head portrait, Aquatic Wildlife Conservation Center, Virginia. Captive, originally from Little River, Virginia, USA.
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Joel Sartore / Photo Ark / Bigmouth chub (Nocomis platyrhynchus) portrait, Aquatic Wildlife Conservation Center, Virginia. Captive, originally from Little River, Virginia, USA.
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Joel Sartore / Photo Ark / Blue Ridge sculpin (Cottus ceruleomentum) portrait, Aquatic Wildlife Conservation Center, Virginia. Captive, originally from the Roanoke River, Virginia, USA.