Теория:

To speak about seafood, you need the appropriate vocabulary.
  
prawn-1239427_640.png
Рис. \(1\). Seafood
 
Plaice – камбала

Crab – краб

Shrimp – мелкая креветка

Salmon – лосось, семга

Grouper – морской окунь
 
Lobster – омар

Sturgeon – осетр

Sardine – сардина

Herring – сельдь

Pike – щука
 
Oyster – устрица

Trout – форель
 
Examples:
 
I would like to try a lobster.
 
She dislikes sardines.
Источники:
Рис. 1. Seafood, https://pixabay.com/images/id-1239427/ Pixabay License CC0