This document provides an overview of seafood, including:
1. It defines two main categories of seafood - fin fish and shellfish. It lists examples of different types of fish.
2. It describes the different market forms that fish can be sold in, such as whole, fillets, steaks, etc.
3. It provides tips for checking the freshness of different types of fish and shellfish and guidelines for proper storage and handling of both fresh and frozen seafood.