Meaning
カレイ目 (かれいもく[?], Karei-moku) is Flatfish — a Japanese food (water animals).
What is Flatfish?
Karei-moku (カレイ目 ) are fish in the order Pleuronectiformes. Many important food fish are in this order, including flounders, soles, turbot, plaice, and halibut. Karei proper are the family Pleuronectidae (カレイ科), the flounders.