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Kyphosidae
Family, Bony fish (Actinopterygii), Marine
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Labridae – Wrasse
Family, Bony fish (Actinopterygii), Marine
muc-creige, mucan-creige
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Lamnidae – Mackerel sharks
Family, Cartilagenous fish (Chondrichthyes), Marine
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Lampridae – Opahs
Family, Bony fish (Actinopterygii), Marine
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Leptochilichthyidae
Family, Bony fish (Actinopterygii), Marine
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Liparidae – Sea snails
Family, Bony fish (Actinopterygii), Marine
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Lophiidae – Anglerfishes
Family, Bony fish (Actinopterygii), Marine
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Lotidae
Family, Bony fish (Actinopterygii), Marine, terrestrial
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Luvaridae – Luvar
Family, Bony fish (Actinopterygii), Marine
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Macrouridae – Grenadiers
Family, Bony fish (Actinopterygii), Marine, terrestrial
Grenadiers or rattails
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Melamphaidae – Bigscale fishes
Family, Bony fish (Actinopterygii), Marine
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Melanocetidae
Family, Bony fish (Actinopterygii), Marine
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Melanonidae – Pelagic cods
Family, Bony fish (Actinopterygii), Marine
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Merlucciidae – Hakes
Family, Bony fish (Actinopterygii), Marine
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Microstomatidae
Family, Bony fish (Actinopterygii), Marine
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Mirapinnidae – Mirapinnids
Family, Bony fish (Actinopterygii), Marine
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Molidae – Sunfishes
Family, Bony fish (Actinopterygii), Marine
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Moridae – Deep-sea cods
Family, Bony fish (Actinopterygii), Marine
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Moronidae
Family, Bony fish (Actinopterygii), Marine, terrestrial
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Mugilidae
Family, Bony fish (Actinopterygii), Marine, terrestrial