As we have discussed the birds of the air and the beasts of the field, the denizens of the ocean are also seen in armory. They range from the dolphin (a fish very different from Flipper) and the whale through various different fish used primarily for canting. Rounding out the aquatic cavalcade are lobsters, crabs, escallops, octopi and squid (known as kraken).
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| A dolphin | A lucy (medieval name for pike) | A whale | A lobster |
Just as beasts and birds have certain names for postures, most fish have specific names for postures, as outlined below.
| Posture | Defining traits | stylised drawing | Example |
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| Embowed | Curved body bending 'inward' |  |
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| Embowed-counterembowed | 'S' shaped curve to the body, Seen most often with dolphins. |  |
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| Haurient | Body in pale, head to chief |  |
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| Naiant | Body in fess, head to dexter |  |
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| Urinant | Body in pale, head to base |  |
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