sea fish
The Spanish term 'pescado de mar' directly translates to 'sea fish' in English. This will often refer to any kind of fish that is sourced or caught from the sea as opposed to freshwater sources. The 'pescado' part of the term refers to 'fish' and the 'de mar' part simply means 'of the sea'. However, this can be broadly used to talk about a variety of fish species, including those that are often caught for food.
This sea fish is delicious.
In this sentence, we are using 'pescado de mar' to describe the fish being eaten. It is common in Spanish to specify the type of fish and its origin.
My favorite dinner is grilled sea fish.
This sentence demonstrates how 'pescado de mar' can be used to describe a preferred type of meal. Note that adjectives such as 'a la parrilla' (grilled) typically follow the noun in Spanish.
Sea fish is a rich source of omega-3.
This sentence emphasizes the nutritional value of 'pescado de mar'. When talking about nutritional content, it's common to use 'es una fuente rica de' (is a rich source of).