Theorie:
Study vocabulary about fish and sea animals. Part 1
Carp – Karpfen
Cod – Dorsch, Kabeljau
Crab – Krabbe
Dolphin – Delfin
Eel – Aal
Fish – Fisch
Goldfish – Goldfisch
Jellyfish – Qualle
Lobster – Hummer
Marine animal – Meerestier
Perch – Barsch
Examples:
In the sea there are many dolphins.
Perch is a very nice fish.