Theorie:
To speak about seafood, you need the appropriate vocabulary.

Plaice – Scholle
Crab – Krabbe
Shrimp – Garnele
Salmon – Lachs
Grouper – Barsch
Lobster – Hummer
Sturgeon – Stör
Sardine – Sardine
Herring – Hering
Pike – Hecht
Oyster – Auster
Trout – Forelle
Quellen:
http://www.loligos.co.za/?lightbox=image_7t3