Opsophagos
Opsophagos was a type of ancient Greek person exhibited a seemingly uncontrollable desire for opson or 'relishes.' The vice of the opsophagos was opsophagia for which the closest English equivalent is gourmandise. However, because fish/seafood was considered by far the most desirable opson, an opsophagos in ancient Greek literature almost always refers to a man obsessed with fish or seafood.