Pure Arctic

Fresh & frozen wild Icelandic fish

Hrogn

Roe (fish eggs)

Hrygna

Female fish (female salmon/trout etc.; hen)

Grásleppa

Lumpfish (often the roe fish)

Hængur

Male fish (male salmon/trout etc.; buck)
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Loðna

Capelin
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Rauðmagi

Sea snail (red whelk) sometimes used as a by-name alongside grásleppa in fisheries contexts
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Steinbítur

Wolffish (catfish family; often "Atlantic wolffish")

Skötuselur

Monkfish (anglerfish)

Ufsi

Saithe (coalfish)

Langa

Ling
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Blálanga

Blue-ling
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Hlýri

Tusk
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Blágóma

Blue whiting

Karfi

Redfish (Sebastes; often "ocean perch")

Úthafskari

Deep-sea redfish (a redfish species)

Grálúða

Greenland halibut (turbot in some markets, but standard is Greenland halibut)

Sæbjúgu

Sea cucumber

Hlýri

Tusk
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Tindabikkja

Spiny dogfish (a small shark)
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Glerskata

Starry ray / thornback-type ray (common "ray/skate" term)
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Rottufiskur

Ratfish (also called rabbitfish / chimaera)
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Afskurður

Trimmings / offcuts

Framparturinn

The front portion (the most valuable part of the fillet)

Þorskhnakki

Cod loin (literally "the cod neck/back," i.e., the thick, prime back/loin cut of the cod).