Sole is a fish belonging to several families. Generally speaking, they are members of the family Soleidae, but, outside Europe, the name sole is also applied to various other similar flatfish, especially other members of the sole suborder Soleoidei as well as members of the flounder family. In European cookery, there are several species which may be considered true soles, but the common or Dover sole Solea solea, often simply called the sole, is the most esteemed and most widely available.
From all animals of water we are allowed to eat :
1. Fish which has or had scales on it. Fish which has no scales at all are not allowed to eat.
2. Shrimps or prawns.
All other water animals e.g. crab, oyster, shells, lobster, ink fish etc is not allowed to eat.