==The Fish Event Horizon==
The types of fish eaten in England can be divided into three periods:
# 1 Period 1: C7th – C10th <br> dominated by Freshwater and Migratory# 2 Period 2: C11th – C12th <br> more Marine than Fresh Water or Migratory. # 3 Period 3: C13th – C16th <br> some areas just have Marine<br>
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